CN113915732B - Air conditioner, air conditioner control method and device thereof and storage medium - Google Patents
Air conditioner, air conditioner control method and device thereof and storage medium Download PDFInfo
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- CN113915732B CN113915732B CN202010661574.9A CN202010661574A CN113915732B CN 113915732 B CN113915732 B CN 113915732B CN 202010661574 A CN202010661574 A CN 202010661574A CN 113915732 B CN113915732 B CN 113915732B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
- F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
- F24F2110/22—Humidity of the outside air
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/40—Pressure, e.g. wind pressure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioner control method, which comprises the following steps: when the air conditioner starts heating operation, controlling an outdoor fan to operate at a first rotating speed, wherein the first rotating speed is greater than or equal to a set rotating speed threshold; and when the outdoor heat exchanger reaches a defrosting condition, controlling the air conditioner to switch to refrigeration operation so as to defrost the outdoor heat exchanger. The invention also discloses an air conditioner control device, an air conditioner and a readable storage medium. The invention aims to delay the frosting of the air conditioner, avoid frequent defrosting of the outdoor heat exchanger when the air conditioner operates in heating, keep the temperature of the indoor environment stable and improve the comfort of the indoor environment.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner control method, an air conditioner control device, an air conditioner and a readable storage medium.
Background
Under the low temperature environment, the air conditioner heats in the process, the frosting phenomenon can appear in the outdoor heat exchanger of air conditioner, when frosting more, seriously influences the heat exchange efficiency of outdoor heat exchanger, not only influences the travelling comfort of indoor environment, still can cause the system efficiency to descend. Therefore, the air conditioner is generally provided with a defrosting mode, and when the frosting phenomenon of the outdoor heat exchanger is detected to be serious, the air conditioner is controlled to be switched from heating operation to cooling operation so as to defrost the outdoor heat exchanger.
At present, among the air conditioner defrosting control process, generally judge the severity of outdoor heat exchanger's frosting based on coil pipe temperature and outdoor ambient temperature, just control the air conditioner and get into the mode of changing frost when the frost layer is comparatively serious, because the hydrophilic coating is generally used on outdoor heat exchanger surface, form the water film on outdoor heat exchanger surface easily under the environment of low temperature high humidity, the speed of frosting is very fast, it needs frequently to defrost outdoor heat exchanger to lead to the air conditioner can when the heating operation, it is great to lead to indoor ambient temperature fluctuation, seriously influence the travelling comfort of indoor environment.
Disclosure of Invention
The invention mainly aims to provide an air conditioner control method, which aims to delay the frosting of an air conditioner, avoid frequent defrosting of an outdoor heat exchanger during heating operation of the air conditioner, keep the temperature of an indoor environment stable and improve the comfort of the indoor environment.
In order to achieve the above object, the present invention provides an air conditioner control method, including the steps of:
when the air conditioner starts heating operation, controlling an outdoor fan to operate at a first rotating speed, wherein the first rotating speed is greater than or equal to a set rotating speed threshold; and
and when the outdoor heat exchanger reaches a defrosting condition, controlling the air conditioner to switch to refrigerating operation so as to defrost the outdoor heat exchanger.
Optionally, the step of controlling the outdoor fan to operate at the first rotation speed includes:
acquiring the maximum operation rotating speed of the outdoor fan, and taking the maximum operation rotating speed as the first rotating speed; and
and controlling the outdoor fan to operate at the maximum operation speed.
Optionally, the step of controlling the outdoor fan to operate at the first rotation speed includes:
acquiring the current temperature and humidity of the outdoor environment;
determining the first rotating speed according to the temperature and the humidity; and
controlling the outdoor fan to operate at the determined first rotational speed.
Optionally, before the step of controlling the air conditioner to switch to the cooling operation when the outdoor heat exchanger reaches the defrosting condition, the method further includes:
acquiring the current condensation state of the outdoor heat exchanger; and
when the condensation state is that liquid drops start to gather, controlling the running rotating speed of the outdoor fan to be reduced to a second rotating speed; wherein the second rotational speed is less than the first rotational speed.
Optionally, the step of obtaining the current condensation state of the outdoor heat exchanger includes:
acquiring a first change rate and a second change rate of the air pressure difference corresponding to the outdoor heat exchanger; the first change rate is the change rate of the air pressure difference between the air inlet side and the air outlet side of the outdoor heat exchanger detected in a first time period, the second change rate is the change rate of the air pressure difference between the air inlet side and the air outlet side of the outdoor heat exchanger detected in a second time period, and the time in the first time period is earlier than the time in the second time period; and
and determining the condensation state according to the first change rate and the second change rate.
Optionally, the step of determining the condensation state according to the first rate of change and the second rate of change comprises:
when the second rate of change is greater than the first rate of change, determining the condensation state as the beginning of droplet aggregation; and
determining that the droplet has not begun to agglomerate when the second rate of change is less than or equal to the first rate of change.
Optionally, after the step of controlling the outdoor fan to operate at the first rotation speed when the air conditioner starts heating operation, the method further includes:
acquiring the continuous operation duration of a compressor after the air conditioner starts heating operation; and
and when the continuous operation time length reaches the set time length, executing the step of acquiring the current condensation state of the outdoor heat exchanger.
Optionally, after the step of controlling the outdoor fan to operate at the first rotation speed when the air conditioner starts heating operation, the method further includes:
acquiring the current air pressure difference between the air inlet side and the air outlet side of the outdoor heat exchanger; and
and when the current air pressure difference is greater than or equal to a set pressure difference threshold value, determining that the outdoor heat exchanger reaches the defrosting condition.
Optionally, before the step of determining that the outdoor heat exchanger reaches the defrosting condition when the current air pressure difference is greater than or equal to a set pressure difference threshold, the method further includes:
acquiring the current running rotating speed of the outdoor fan; and
and determining the set pressure difference threshold according to the current running rotating speed.
In addition, in order to achieve the above object, the present application also proposes an air conditioning control device including: the air conditioner control method comprises a memory, a processor and an air conditioner control program stored on the memory and capable of running on the processor, wherein the air conditioner control program realizes the steps of the air conditioner control method according to any one of the above items when being executed by the processor.
In addition, in order to achieve the above object, the present application also proposes an air conditioner including the air conditioning control device as described above.
Optionally, the air conditioner further comprises:
an outdoor heat exchanger; and
and the hydrophobic layer is arranged on the surface of the outdoor heat exchanger.
In addition, in order to achieve the above object, the present application also proposes a readable storage medium having stored thereon an air conditioning control program, which when executed by a processor, implements the steps of the air conditioning control method according to any one of the above.
The invention provides an air conditioner control method, which is characterized in that when an air conditioner starts to operate at a heating speed, an outdoor fan is controlled to operate at a first rotating speed which is greater than or equal to a set rotating speed threshold value, when an outdoor heat exchanger reaches a defrosting condition, the air conditioner is controlled to switch to a refrigerating operation to defrost the outdoor heat exchanger, the defrosting process of the outdoor heat exchanger is interfered and controlled early in a mode of controlling the outdoor fan to operate at a higher rotating speed when the air conditioner starts to operate at a heating speed, water drops are blown away at a high wind speed in the process of forming the water drops on the surface of the outdoor heat exchanger, condensation and frosting on the outdoor heat exchanger are avoided, so that the frosting of the air conditioner is effectively delayed, the air conditioner is prevented from frequently defrosting the outdoor heat exchanger during the heating operation, the temperature of an indoor environment is kept stable, and the comfort of the indoor environment is improved.
Drawings
FIG. 1 is a schematic view of a portion of the structure of an air conditioner according to the present invention in relation to an outdoor heat exchanger;
FIG. 2 is a schematic diagram of a hardware configuration involved in the operation of an embodiment of the air conditioning control apparatus of the present invention;
FIG. 3 is a flowchart illustrating an embodiment of an air conditioning control method according to the present invention;
FIG. 4 is a schematic flow chart illustrating an air conditioning control method according to another embodiment of the present invention;
fig. 5 is a flowchart illustrating an air conditioner control method according to another embodiment of the present invention.
The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The main solution of the embodiment of the invention is as follows: when the air conditioner starts heating operation, controlling an outdoor fan to operate at a first rotating speed, wherein the first rotating speed is greater than or equal to a set rotating speed threshold; and when the outdoor heat exchanger reaches a defrosting condition, controlling the air conditioner to switch to refrigeration operation so as to defrost the outdoor heat exchanger.
Because among the prior art, among the air conditioner defrosting control process, generally judge the severity of outdoor heat exchanger's frosting based on coil pipe temperature and outdoor ambient temperature, just control the air conditioner and get into the mode of defrosting when the frost layer is comparatively serious, because the surface of outdoor heat exchanger generally uses hydrophilic coating, form the water film on outdoor heat exchanger surface easily under the environment of low temperature high humidity, the speed of frosting is very fast, lead to the air conditioner can frequently defrost outdoor heat exchanger when heating up the operation, lead to that the fluctuation of indoor ambient temperature is great, seriously influence the travelling comfort of indoor environment.
The invention provides the solution, and aims to delay the frosting of the air conditioner, avoid frequent defrosting of the outdoor heat exchanger during heating operation of the air conditioner, keep the temperature of the indoor environment stable, and improve the comfort of the indoor environment.
The embodiment of the invention provides an air conditioner.
Referring to fig. 1, in the present embodiment, an air conditioner specifically includes an outdoor heat exchanger 1 and an outdoor fan 2 disposed corresponding to the outdoor heat exchanger. Under the disturbance action of the outdoor fan 2 on the air flow, the air inside the air conditioner is blown to the outdoor environment through the outdoor heat exchanger 1. In the present embodiment, the outdoor fan 2 is specifically a counter-rotating fan.
Further, in this embodiment, the air conditioner further includes a hydrophobic layer (not shown) disposed on the surface of the outdoor heat exchanger 1. The hydrophobic layer (not shown) is a layered structure made using a hydrophobic material. In this embodiment, through the use of hydrophobic layer, the liquid drop that forms on the surface of outdoor heat exchanger is very easy to drip under the effect of self gravity or external force, is difficult to gather on the surface of outdoor heat exchanger to be favorable to delaying the frosting of outdoor heat exchanger.
Further, in this embodiment, referring to fig. 1, the air conditioner further includes a differential pressure sensor 3 disposed on an air inlet side and/or an air outlet side of the outdoor heat exchanger 1. The two sides of the outdoor heat exchanger 1 can be divided into an air inlet side and an air outlet side based on the airflow direction, and the differential pressure sensor 3 is used for detecting the air pressure difference between the air inlet side and the air outlet side of the outdoor heat exchanger 1. In fig. 1, side a is defined as an air inlet side of the outdoor heat exchanger, and side B is defined as an air outlet side of the outdoor heat exchanger.
Furthermore, the embodiment of the invention also provides an air conditioner control device. In the present embodiment, the air conditioner control device is built in the air conditioner. In other embodiments, the air conditioning control device may also be provided independently of the air conditioner.
In an embodiment of the present invention, referring to fig. 2, an air conditioning control apparatus includes: a processor 1001 (e.g., CPU), memory 1002, etc. The memory 1002 may be a high-speed RAM memory or a non-volatile memory such as a disk memory. The memory 1002 may alternatively be a storage device separate from the processor 1001.
The memory 1002, the outdoor fan 2 in the air conditioner, and the differential pressure sensor 3 are all connected to the processor 1001. The processor 1001 may control the operation of the outdoor fan 2 and may also obtain data collected by the differential pressure sensor 3.
Those skilled in the art will appreciate that the configuration of the device shown in fig. 2 is not intended to be limiting of the device and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 2, an air conditioner control program may be included in the memory 1002, which is a readable storage medium. In the apparatus shown in fig. 2, the processor 1001 may be configured to call an air-conditioning control program stored in the memory 1002, and perform operations of the relevant steps of the air-conditioning control method in the following embodiments.
The embodiment of the invention also provides an air conditioner control method which is applied to the air conditioner, in particular to the air conditioner with the hydrophobic layer arranged on the surface of the outdoor heat exchanger.
Referring to fig. 3, an embodiment of an air conditioning control method according to the present application is provided. In this embodiment, the air conditioning control method includes:
step S10, when the air conditioner starts heating operation, controlling an outdoor fan to operate at a first rotating speed, wherein the first rotating speed is greater than or equal to a set rotating speed threshold value;
when the air conditioner is in heating operation, the outdoor heat exchanger is an evaporator, and the indoor heat exchanger is a condenser. The starting of the heating operation of the air conditioner may refer to a case that the air conditioner is switched from a shutdown state to a heating operation state, or may refer to a case that the air conditioner is switched from a cooling operation state to a heating operation state.
The first rotating speed can be a preset rotating speed or a rotating speed determined according to the actual working condition of the air conditioner. The set rotational speed threshold value may be set according to actual conditions, and for example, a rotational speed value of 70% or 90% of the maximum operating rotational speed may be used as the set rotational speed threshold value. The first rotating speed is larger than or equal to the set rotating speed threshold value, and the outdoor fan is indicated to operate at a larger rotating speed when the air conditioner starts heating.
In this embodiment, the maximum operating speed of the outdoor fan is obtained, and the maximum operating speed is used as the first speed to control the outdoor fan to operate at the maximum operating speed. Specifically, the maximum operating speed in this embodiment is in a range of [800rad/min,950rad/min ], and in other embodiments, the maximum operating speed may be set to other values according to actual requirements.
In another embodiment, the current temperature and humidity of the outdoor environment are acquired, the first rotating speed is determined according to the temperature and humidity, and the outdoor fan is controlled to operate at the determined first rotating speed. When the humidity is constant, the smaller the temperature is, the larger the corresponding first rotating speed is, and the larger the temperature is, the smaller the corresponding first rotating speed is; when the temperature is constant, the higher the humidity is, the higher the corresponding first rotating speed is, and the lower the humidity is, the lower the corresponding first rotating speed is. It should be noted that the determined first rotation speed is not lower than the set rotation speed threshold, so that the rotation speed value can be selected as the first rotation speed according to the humidity and the temperature of the outdoor environment in the rotation speed range between the set rotation speed threshold and the maximum operation rotation speed. Specifically, a reference value of the first rotation speed may be determined within the rotation speed range according to the temperature, an adjustment value corresponding to the reference value may be determined according to the humidity, and a sum of the reference value and the adjustment value may be used as the first rotation speed.
Specifically, in order to ensure the stability of the operation of the air conditioning system, because the outdoor heat exchanger is easy to frost in a low-temperature and high-humidity environment, when the air conditioner starts heating operation, the temperature and the humidity of the outdoor environment are acquired, and the step of controlling the outdoor fan to operate at the first rotation speed is executed when the temperature is less than or equal to a set threshold (such as 5 ℃) and the humidity is greater than or equal to a set threshold (such as a humidity index of 60%).
And S20, when the outdoor heat exchanger reaches a defrosting condition, controlling the air conditioner to switch to a refrigerating operation so as to defrost the outdoor heat exchanger.
The defrosting condition refers to a critical state that is required to be reached by an air conditioner operation parameter and/or a parameter in an environment where the outdoor heat exchanger is located when the current frosting degree of the outdoor heat exchanger starts to adversely affect the operation of the air conditioner. In this embodiment, the pressure difference between the air inlet side and the air outlet side of the outdoor heat exchanger is used as a criterion for determining whether the defrosting condition of the outdoor heat exchanger is achieved, and when the pressure difference reaches a set pressure state, it is determined that the defrosting condition of the outdoor heat exchanger is achieved. In other embodiments, other types of parameters may also be used as the basis for determining whether the outdoor heat exchanger reaches the defrosting condition according to actual needs, for example, the coil temperature of the outdoor heat exchanger, the outdoor ambient temperature, and the like.
When the outdoor heat exchanger reaches the defrosting condition, the fact that the air conditioner continues to perform heating operation can cause negative influences on the stability of operation and heat exchange efficiency of an air conditioner system is shown, therefore, the air conditioner is controlled to be switched from the current heating operation to the cooling operation, the outdoor heat exchanger is changed from an evaporator to a condenser, and frost on the surface of the outdoor heat exchanger is melted through heat dissipated by a refrigerant in the condenser.
The air conditioner control method provided by the embodiment of the invention is characterized in that when the air conditioner starts to operate in a heating mode, the outdoor fan is controlled to operate at a first rotating speed which is greater than or equal to a set rotating speed threshold value, when an outdoor heat exchanger reaches a defrosting condition, the air conditioner is controlled to switch to a cooling mode to defrost the outdoor heat exchanger, the defrosting process of the outdoor heat exchanger is interfered and controlled early in a mode of controlling the outdoor fan to operate at a higher rotating speed when the air conditioner starts to operate in the heating mode, water drops are blown away at a high wind speed in the process of forming the water drops on the surface of the outdoor heat exchanger, condensation and frosting on the outdoor heat exchanger are avoided, so that the frosting of the air conditioner is effectively delayed, the air conditioner is prevented from frequently defrosting the outdoor heat exchanger in the heating mode, the indoor environment temperature is kept stable, and the comfort of the indoor environment is improved.
Further, based on the above embodiment, another embodiment of the air conditioner control method of the present application is provided. In this embodiment, referring to fig. 4, before the step S20, the method further includes:
s01, acquiring the current condensation state of the outdoor heat exchanger;
when the condensation state is that the liquid drops start to gather, executing step S02; when the condensation state is such that the droplets do not start to be collected, the process may return to step S01 after step S03 is executed.
The condensation state specifically refers to a state in which droplets grow on the surface of the outdoor heat exchanger. The condensation state specifically includes a state in which a droplet starts to form, a droplet continues to grow, and a droplet starts to aggregate. Here, the state in which the droplets start to aggregate refers to a state in which the droplets aggregate into a water bridge. In the present embodiment, the start of droplet formation and the continuous growth of droplets can be classified into a state where droplets do not start to be accumulated, and in this state, droplets formed on the surface of the outdoor heat exchanger are likely to leave the surface of the outdoor heat exchanger by an external force and are not accumulated on the surface of the outdoor heat exchanger. S02, controlling the running rotating speed of the outdoor fan to be reduced to a second rotating speed; wherein the second rotational speed is less than the first rotational speed;
the second rotating speed can be a preset rotating speed or can be specifically set based on the current actual frosting condition of the outdoor heat exchanger. For example, in the present embodiment, the second rotation speed is the preset initial rotation speed of the outdoor fan, and the numerical range is [450rad/min,600rad/min ].
And S03, controlling the outdoor fan to maintain the first rotating speed to operate.
In this embodiment, when the liquid droplets on the outdoor heat exchanger begin to collect, it is indicated that a large amount of liquid droplets have been collected on the surface of the outdoor heat exchanger, and the formed liquid droplets have formed a water bridge, and the possibility that the liquid droplets are blown away by the outdoor fan is low, and at this time, the outdoor fan is controlled to operate at a reduced rotation speed, so as to save energy consumption and reduce noise generated by the outdoor fan.
Specifically, in this embodiment, step S01 includes:
step S011, acquiring a first change rate and a second change rate of the air pressure difference corresponding to the outdoor heat exchanger; the first change rate is the change rate of the air pressure difference between the air inlet side and the air outlet side of the outdoor heat exchanger detected in a first time period, the second change rate is the change rate of the air pressure difference between the air inlet side and the air outlet side of the outdoor heat exchanger detected in a second time period, and the time in the first time period is earlier than the time in the second time period;
specifically, when the outdoor fan operates at a first rotation speed, a first air pressure difference P1 between the air inlet side and the air outlet side of the outdoor heat exchanger is obtained at a first time T1, and a second air pressure difference P2 between the air inlet side and the air outlet side of the outdoor heat exchanger is obtained at a second time T2 at intervals of a set time, so that a first change rate K1= P1-P2 |/| T1-T2 |. And then, acquiring a third pressure difference P3 between the air inlet side and the air outlet side of the outdoor heat exchanger at a third moment T3 at a set time interval, and acquiring a fourth pressure difference P4 between the air inlet side and the air outlet side of the outdoor heat exchanger at a fourth moment T4, and accordingly, acquiring a second change rate K2= | -P3-P4 |/| -T3-T4 |, wherein T2 is less than or equal to T3. In this embodiment, the value range of the set time is [1min,5min ]. In other implementations, the setting time can be set to other values according to actual needs.
And a step S012 of determining the condensation state according to the first change rate and the second change rate.
The different first and second rates of change may correspond to different condensation states, such as a magnitude relationship, and a magnitude relationship. Specifically, when the second rate of change is greater than the first rate of change, the condensation state is determined as the beginning of aggregation of the droplets; determining that the droplet has not begun to agglomerate when the second rate of change is less than or equal to the first rate of change.
In this embodiment, different condensation states on the surface of the outdoor heat exchanger are characterized by the above steps S011 and S012 based on the sequentially detected change rates of the air pressure difference between the air inlet side and the air outlet side of the outdoor heat exchanger, so that the actual state of the condensation stage of the frosting process of the outdoor heat exchanger can be accurately identified by detection based on the air pressure difference, the rotating speed of the outdoor fan is timely reduced when the condensation state is that liquid drops begin to gather, the frosting is delayed, the energy consumption and noise of the outdoor fan are timely reduced, and the running performance of the air conditioner is ensured.
Based on the above steps S011 and S012, the second rotation speed in the above step S02 may be a set rotation speed, and in other embodiments, the second rotation speed may be determined based on a deviation between the first rate of change and the second rate of change, and the larger the deviation, the smaller the second rotation speed.
Specifically, in this embodiment, after step S10, the continuous operation duration of the compressor after the air conditioner starts heating operation is obtained; and when the continuous operation time length reaches the set time length, executing the step of acquiring the current condensation state of the outdoor heat exchanger. The specific value of the set duration can be determined according to actual conditions, and in this embodiment, the set duration is specifically [30min,60min ]. Because the liquid drops on the outdoor heat exchanger are in a forming stage at the initial stage of the operation of the compressor, the pressure difference between the air inlet side and the air outlet side of the outdoor heat exchanger is inevitably increased, and therefore when the continuous operation time of the compressor does not reach the set time, the outdoor fan can maintain the first rotating speed to operate so as to blow away the liquid drops formed on the surface of the outdoor heat exchanger and slow down condensation and frosting on the surface of the outdoor heat exchanger; when the continuous operation time of the compressor reaches the set time, the outdoor heat exchanger can generate more liquid drops under the low-temperature action of the evaporator, and at the moment, the condensation state of the outdoor heat exchanger can be identified, so that the operation rotating speed of the outdoor fan can be timely reduced, and the outdoor fan is prevented from operating in a high-energy-consumption and high-noise state for a long time.
Further, based on any of the above embodiments, another embodiment of the air conditioner control method of the present application is provided. In this embodiment, referring to fig. 5, after step S10, the method further includes:
s11, acquiring the current air pressure difference between the air inlet side and the air outlet side of the outdoor heat exchanger;
the current air pressure difference can be obtained by acquiring the current detection data of a pressure difference sensor arranged on the outdoor heat exchanger.
And S12, when the current air pressure difference is greater than or equal to a set pressure difference threshold value, determining that the outdoor heat exchanger reaches the defrosting condition, and executing the step S20.
The specific value for setting the pressure difference threshold value can be set according to actual conditions. The pressure difference threshold value may be set to a preset value, for example, one of the values in the range of [80pa,100pa ] may be selected as the pressure difference threshold value. In addition, in other embodiments, the current operating speed of the outdoor fan may also be obtained, and the set pressure difference threshold may be determined according to the current operating speed. Different current operating speeds may correspond to different set pressure differential thresholds. The larger the current running rotating speed of the outdoor fan is, the larger the corresponding set pressure difference threshold value is, so that the accuracy of the determined set pressure difference threshold value is ensured.
When step S01, step S02, and step S03 are included after step S10, step S11 in the present embodiment may be executed after step S02.
In this embodiment, based on the air inlet side of outdoor heat exchanger and the current atmospheric pressure difference of air-out side, whether reach the decision criterion of setting for the condition of defrosting as outdoor heat exchanger to the realization carries out accurate sign to the current severity of frosting of outdoor heat exchanger, in time defrosts outdoor heat exchanger when outdoor heat exchanger frosts seriously, in order effectively to avoid frosting to the air conditioner operation, heat exchange efficiency's negative effects, guarantees air conditioning system normal operating.
It should be noted that the air conditioner control method can also be applied to an air conditioner with a hydrophilic layer arranged on the surface of the outdoor heat exchanger according to actual requirements.
In addition, an embodiment of the present invention further provides a readable storage medium, where an air conditioning control program is stored, and the air conditioning control program, when executed by a processor, implements the relevant steps of any of the above air conditioning control methods.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of other like elements in a process, method, article, or system comprising the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention or the portions contributing to the prior art may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) as described above and includes several instructions for enabling a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are also included in the scope of the present invention.
Claims (11)
1. An air conditioning control method, characterized by comprising the steps of:
when the air conditioner starts heating operation, controlling an outdoor fan to operate at a first rotating speed, wherein the first rotating speed is greater than or equal to a set rotating speed threshold; the set rotation speed threshold is 70% of the maximum operation rotation speed of the outdoor fan, an
When the outdoor heat exchanger reaches a defrosting condition, controlling the air conditioner to switch to refrigeration operation so as to defrost the outdoor heat exchanger;
when the outdoor heat exchanger reaches the defrosting condition, before the step of controlling the air conditioner to switch to the cooling operation, the method further comprises the following steps:
acquiring the current condensation state of the outdoor heat exchanger;
when the condensation state is that liquid drops start to gather, controlling the running rotating speed of the outdoor fan to be reduced to a second rotating speed; wherein the second rotational speed is less than the first rotational speed;
the step of obtaining the current condensation state of the outdoor heat exchanger comprises the following steps:
acquiring a first change rate and a second change rate of the air pressure difference corresponding to the outdoor heat exchanger; the first change rate is the change rate of the air pressure difference between the air inlet side and the air outlet side of the outdoor heat exchanger detected in a first time period, the second change rate is the change rate of the air pressure difference between the air inlet side and the air outlet side of the outdoor heat exchanger detected in a second time period, and the time in the first time period is earlier than the time in the second time period;
when the second rate of change is greater than the first rate of change, determining the condensation state as a start of droplet aggregation.
2. The air conditioning control method as claimed in claim 1, wherein the step of controlling the outdoor fan to operate at the first rotation speed comprises:
acquiring the maximum operation rotating speed of the outdoor fan, and taking the maximum operation rotating speed as the first rotating speed; and
and controlling the outdoor fan to operate at the maximum operation speed.
3. The air conditioning control method as claimed in claim 1, wherein the step of controlling the outdoor fan to operate at the first rotation speed comprises:
acquiring the current temperature and humidity of the outdoor environment;
determining the first rotating speed according to the temperature and the humidity; and
controlling the outdoor fan to operate at the determined first rotational speed.
4. The air conditioning control method according to claim 1, wherein the step of obtaining the first rate of change and the second rate of change of the air pressure difference corresponding to the outdoor heat exchanger is followed by further comprising:
determining the condensation state as the droplets not starting to aggregate when the second rate of change is less than or equal to the first rate of change.
5. The air conditioning control method as claimed in claim 4, wherein after the step of controlling the outdoor fan to operate at the first rotation speed when the air conditioner starts a heating operation, further comprising:
acquiring the continuous operation duration of a compressor after the air conditioner starts heating operation; and
and when the continuous operation time length reaches the set time length, executing the step of acquiring the current condensation state of the outdoor heat exchanger.
6. The control method of an air conditioner according to any one of claims 1 to 5, further comprising, after the step of controlling the outdoor fan to operate at the first rotation speed when the air conditioner starts a heating operation, the step of:
acquiring the current air pressure difference between the air inlet side and the air outlet side of the outdoor heat exchanger; and
and when the current air pressure difference is greater than or equal to a set pressure difference threshold value, determining that the outdoor heat exchanger reaches the defrosting condition.
7. The air conditioning control method according to claim 6, wherein before the step of determining that the outdoor heat exchanger reaches the defrosting condition when the current air pressure difference is greater than or equal to a set pressure difference threshold, further comprising:
acquiring the current running rotating speed of the outdoor fan; and
and determining the set pressure difference threshold according to the current running rotating speed.
8. An air conditioning control device characterized by comprising: a memory, a processor and an air conditioning control program stored on the memory and executable on the processor, the air conditioning control program when executed by the processor implementing the steps of the air conditioning control method of any one of claims 1 to 7.
9. An air conditioner characterized by comprising the air conditioning control device according to claim 8.
10. The air conditioner according to claim 9, further comprising:
an outdoor heat exchanger; and
and the hydrophobic layer is arranged on the surface of the outdoor heat exchanger.
11. A readable storage medium, having stored thereon an air conditioning control program, which when executed by a processor, implements the steps of the air conditioning control method according to any one of claims 1 to 7.
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| CN106288144A (en) * | 2016-07-26 | 2017-01-04 | 广东美的暖通设备有限公司 | Air-conditioner and Defrost method thereof |
| CN107421061B (en) * | 2017-07-06 | 2020-04-24 | 青岛海尔空调器有限总公司 | Anti-condensation control method and device for air conditioner |
| CN107560007B (en) * | 2017-08-15 | 2021-07-30 | 广东美的暖通设备有限公司 | Air conditioning system and condensation prevention control method and device for refrigerant radiating pipe of air conditioning system |
| CN107906674A (en) * | 2017-11-09 | 2018-04-13 | 海信（山东）空调有限公司 | The control method of air conditioner |
| CN109812935A (en) * | 2019-01-29 | 2019-05-28 | 广东美的暖通设备有限公司 | Air conditioner, the control method of air conditioner and storage medium |
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