CN110631206A - Defrosting control method and device for air conditioner - Google Patents

Defrosting control method and device for air conditioner Download PDF

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Publication number
CN110631206A
CN110631206A CN201810664229.3A CN201810664229A CN110631206A CN 110631206 A CN110631206 A CN 110631206A CN 201810664229 A CN201810664229 A CN 201810664229A CN 110631206 A CN110631206 A CN 110631206A
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China
Prior art keywords
air conditioner
temperature
defrosting
value
inner coil
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CN201810664229.3A
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Chinese (zh)
Inventor
许文明
王飞
张心怡
丁爽
罗荣邦
袁俊军
李皖皖
李阳
陈可兄
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Qingdao Haier Air Conditioner Gen Corp Ltd
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Qingdao Haier Air Conditioner Gen Corp Ltd
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Priority to CN201810664229.3A priority Critical patent/CN110631206A/en
Publication of CN110631206A publication Critical patent/CN110631206A/en
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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses a defrosting control method and device of an air conditioner, and belongs to the technical field of air conditioners. The defrosting control method comprises the following steps: acquiring the temperature of an inner coil pipe and the rotating speed of an inner fan when the air conditioner operates; determining defrosting duration according to the temperature of the inner coil and the air speed of the inner fan; and when the air conditioner meets the defrosting triggering condition, controlling the air conditioner to operate the defrosting mode for a defrosting time. The defrosting control method of the air conditioner can determine the defrosting mode running time of the air conditioner according to the internal machine running parameters such as the temperature of the internal coil pipe, the rotating speed of the internal fan and the like, so that when the frosting problem of the air conditioner is judged to possibly exist, the air conditioner can be controlled in time to defrost the outdoor unit according to the determined defrosting time; the defrosting time of the defrosting control method does not depend on outdoor environment parameters, the defrosting process can be controlled only through the operation parameters of the indoor unit, the intellectualization of air conditioner control is improved, and the extra production cost caused by the configuration of an outdoor sensor is avoided.

Description

Defrosting control method and device for air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to a defrosting control method and device of an air conditioner.
Background
Along with the improvement of living standard of people, air conditioning equipment has also gone into thousands of households, the use of domestic air conditioners and central air conditioners is more and more common, the requirement of users on the comfort level of the air conditioners is more and more high, the problems existing in the use process of the air conditioners are also gradually exposed, and one of the problems is the problem that an outdoor unit of the air conditioner is frosted and frozen when the air conditioner operates in severe cold climate.
When the air conditioner operates in a low-temperature area or an area with large wind and snow, the condensed water flow on the outer surface of the condenser of the outdoor unit can drop on the base plate, the condenser and the base plate of the air conditioner can be frozen under the condition that the air conditioner operates for a long time, the condensed ice layer on the outdoor unit can obstruct the heat exchange between the internal refrigerant and the outdoor environment, the refrigerating efficiency of the air conditioner is reduced, in order to ensure the heating effect of the air conditioner, the air conditioner has to operate with increased power, and the extra consumption of electric energy and the use cost of a user are increased.
Therefore, some conventional air conditioners have a defrosting function to solve the problem of frost and ice formation of an outdoor unit of the air conditioner, for example, heating the outdoor unit by a heating device provided in the outdoor unit, or defrosting and melting ice in an outdoor heat exchanger by a refrigerant discharged from a compressor. An outdoor sensor is commonly matched with the air conditioner, and the outdoor sensor is used for detecting whether the outdoor environment temperature reaches the temperature condition of easily condensing frost or not so as to judge whether the defrosting function is started or not. This results in some fixed frequency air conditioners without outdoor sensors having no defrosting function; for the inverter air conditioner, the defrosting function of the air conditioner is realized by an outdoor sensor on an outdoor unit; in addition, the setting of the defrosting time of the air conditioner starting the defrosting function is often dependent on outdoor environment parameters, for example, the defrosting time is determined according to the outdoor environment temperature, and when the outdoor environment temperature is lower, a longer defrosting time is adopted; when the outdoor environment temperature is higher, the defrosting time is shorter.
Disclosure of Invention
The invention provides a defrosting control method and device of an air conditioner, and aims to solve the problem that the defrosting duration of a defrosting mode can only be determined by the existing fixed-frequency or variable-frequency air conditioner depending on detected outdoor environment parameters. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
According to a first aspect of the present invention, there is provided a defrost control method of an air conditioner, the defrost control method including:
acquiring the temperature of an inner coil pipe and the rotating speed of an inner fan when the air conditioner operates;
determining defrosting duration according to the temperature of the inner coil and the air speed of the inner fan;
and when the air conditioner meets the defrosting triggering condition, controlling the air conditioner to operate the defrosting mode for a defrosting time.
In an alternative embodiment, the defrost control method further comprises:
determining the highest value in the temperature of the inner coil;
and when the temperature of the inner coil pipe is lower than a set temperature value, controlling the air conditioner to switch to a defrosting mode, wherein the set temperature value is the difference between the highest value and a set threshold value.
In an optional embodiment, the control method further comprises:
correcting the highest value in the temperature of the inner coil according to the rotating speed of the inner fan;
the set temperature value is the difference between the corrected maximum value and the set threshold value.
In an alternative embodiment, correcting the highest of the inner coil temperatures based on the inner fan speed comprises:
when the rotating speed of the inner fan is within the set middle wind gear range, the corrected highest value is the difference between the highest value before correction and the first correction value;
when the rotating speed of the inner fan is within the set low wind gear range, the corrected highest value is the difference between the highest value before correction and the second correction value;
wherein the first correction value is less than the second correction value.
In an alternative embodiment, the determining the defrosting time period according to the control of the temperature of the inner coil and the wind speed of the inner fan comprises the following steps:
and matching corresponding defrosting time length from a preset incidence relation according to the temperature of the inner coil and the rotating speed of the inner fan, wherein the incidence relation is used for representing the corresponding relation among the temperature of the inner coil, the wind speed of the inner fan and the defrosting time length obtained according to a pre-experiment.
According to a second aspect of the present invention, there is also provided a defrosting control apparatus of an air conditioner, the defrosting control apparatus including:
the acquiring unit is used for acquiring the temperature of the inner coil pipe and the rotating speed of the inner fan when the air conditioner operates;
the first determining unit is used for determining defrosting duration according to the temperature of the inner coil and the air speed of the inner fan;
and the control unit is used for controlling the air conditioner to operate the defrosting mode in a defrosting time period when the air conditioner meets the defrosting triggering condition.
In an alternative embodiment, the defrost control apparatus further comprises:
the second determining unit is used for determining the highest value in the temperature of the inner coil;
the control unit is specifically used for controlling the air conditioner to switch to the defrosting mode when the temperature of the inner coil pipe is smaller than a set temperature value, and the set temperature value is the difference between the maximum value and a set threshold value.
In an alternative embodiment, the control device further comprises:
the correcting unit is used for correcting the highest value in the temperature of the inner coil according to the rotating speed of the inner fan;
the set temperature value is the difference between the corrected maximum value and the set threshold value.
In an alternative embodiment, the correction unit is specifically configured to:
when the rotating speed of the inner fan is within the set middle wind gear range, the corrected highest value is the difference between the highest value before correction and the first correction value;
when the rotating speed of the inner fan is within the set low wind gear range, the corrected highest value is the difference between the highest value before correction and the second correction value;
wherein the first correction value is less than the second correction value.
In an optional implementation manner, the first determining unit is specifically configured to: and matching corresponding defrosting time length from a preset incidence relation according to the temperature of the inner coil and the rotating speed of the inner fan, wherein the incidence relation is used for representing the corresponding relation among the temperature of the inner coil, the wind speed of the inner fan and the defrosting time length obtained according to a pre-experiment.
The invention adopts the technical scheme and has the beneficial effects that:
the defrosting control method of the air conditioner can determine the defrosting mode running time of the air conditioner according to the internal machine running parameters such as the temperature of the internal coil pipe, the rotating speed of the internal fan and the like, so that when the frosting problem of the air conditioner is judged to possibly exist, the air conditioner can be controlled in time to defrost the outdoor unit according to the determined defrosting time; the defrosting time of the defrosting control method does not depend on outdoor environment parameters, the defrosting process can be controlled only through the operation parameters of the indoor unit, the intellectualization of air conditioner control is improved, and the extra production cost caused by the configuration of an outdoor sensor is avoided.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a flowchart illustrating a defrost control method of an air conditioner according to an exemplary embodiment of the present invention;
fig. 2 is a flowchart illustrating a defrost control method of an air conditioner according to the present invention, according to still another exemplary embodiment;
fig. 3 is a flowchart illustrating a defrost control method of an air conditioner according to the present invention, according to still another exemplary embodiment;
fig. 4 is a flowchart illustrating a defrost control method of an air conditioner according to the present invention, according to still another exemplary embodiment;
fig. 5 is a flowchart illustrating a defrost control method of an air conditioner according to the present invention, according to still another exemplary embodiment;
fig. 6 is a block diagram illustrating a structure of a defrosting control apparatus of an air conditioner according to the present invention according to an exemplary embodiment;
fig. 7 is a block diagram illustrating a structure of a defrosting control apparatus of an air conditioner according to the present invention, according to still another exemplary embodiment;
fig. 8 is a block diagram illustrating a structure of a defrosting control apparatus of an air conditioner according to the present invention, according to still another exemplary embodiment;
fig. 9 is a block diagram illustrating a structure of a defrosting control apparatus of an air conditioner according to the present invention, according to still another exemplary embodiment;
fig. 10 is a block diagram illustrating a structure of a defrosting control apparatus of an air conditioner according to the present invention, according to still another exemplary embodiment.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims. Embodiments may be referred to herein, individually or collectively, by the term "invention" merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in fact disclosed. Herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus 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, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. As for the methods, products and the like disclosed by the embodiments, the description is simple because the methods correspond to the method parts disclosed by the embodiments, and the related parts can be referred to the method parts for description.
The defrosting control method and the defrosting control device can be applied to a fixed-frequency type air conditioner without an outdoor sensor;
alternatively, it may be applied to an inverter type air conditioner having an outdoor sensor.
Here, the inverter type air conditioner may control the defrosting process according to the outdoor environment parameter collected by the outdoor sensor, or may defrost the outdoor unit of the air conditioner by applying the defrosting process defined by the defrosting control method provided by the present invention.
Fig. 1 is a flowchart illustrating a defrost control method of an air conditioner according to an exemplary embodiment of the present invention.
As shown in fig. 1, the present invention provides a defrosting control method for an air conditioner, the air conditioner itself has a defrosting mode capable of defrosting an outdoor unit, the defrosting mode is used to limit a defrosting process for the outdoor unit, for example, an optional defrosting mode is that the air conditioner is switched to a refrigerant flow direction same as a cooling mode, at this time, a high-temperature refrigerant discharged by a compressor first flows through an outdoor heat exchanger, and the heat of the high-temperature refrigerant is transferred outward to melt condensed frost and the like on the outdoor unit.
Specifically, the control flow of the defrosting control method provided by the invention comprises the following steps:
s101, acquiring the temperature of an inner coil and the rotating speed of an inner fan when the air conditioner operates;
as an alternative embodiment, the coil position of the indoor heat exchanger of the air conditioner is provided with a temperature sensor, and the temperature sensor can be used for detecting the real-time temperature of the coil position; in step S101, the real-time temperature of the coil position detected by the temperature sensor is used as the temperature of the inner coil of the current control process.
As an alternative embodiment, the type of the driving device such as a motor configured for the air conditioner to drive the operation of the internal fan is determined information, and the rotating speed of the operation of the internal fan is related to parameters of the motor, such as voltage, current and the like; the current rotating speed of the inner fan can be obtained through conversion according to the model information, the operation parameters and the like of the motor.
S102, matching corresponding prejudgment working conditions from a preset incidence relation according to the temperature of the inner coil and the rotating speed of the inner fan;
here, the correlation is used to represent a corresponding relationship between the temperature of the inner coil, the rotating speed of the inner fan and a prejudged working condition obtained according to a preexperiment, where the prejudged working condition at least includes a frosting working condition and a non-frosting working condition.
In an optional embodiment, before the air conditioner leaves a factory, the corresponding relation between different outdoor working conditions and the temperature of the inner coil pipe and the rotating speed of the inner fan of the air conditioner can be measured and calculated in a simulation experiment mode; the outdoor working condition is related to the outdoor environment temperature and humidity condition, the temperature of an inner coil of the air conditioner is related to the target heating temperature set by a user for the air conditioner, and the rotating speed of an inner fan is related to the heat dissipation capacity of the indoor heat exchanger and can influence the change of the temperature of the inner coil; thus, in a single experiment process, one of the three is used as a fixed value, and one of the three is used as an independent variable, so that a dependent variable corresponding to the combination of the fixed value and the independent variable, namely the last experiment value of the single experiment can be obtained.
Specifically, the rotating speed of the inner fan is used as a fixed value, the outdoor environment temperature or humidity is used as an independent variable, and the temperature of the inner coil is used as a dependent variable, so that the corresponding relation of the temperature of the inner coil under different outdoor environment temperatures or humidity conditions can be obtained; and, through changing the concrete numerical value of the inner fan rotational speed, repeat the above-mentioned experimental process, can get under the condition of different inner fan rotational speeds, the different outdoor ambient temperature or humidity condition that every inner fan rotational speed numerical value contains and the corresponding relation of the inner coil pipe temperature.
For example, the rotating speed of the inner fan is divided into three wind speed gears of high, medium and low; in a group of experiments, the rotating speed of an inner fan is fixed to a high-wind-speed gear, the temperature values of the temperature of an inner coil pipe are measured when the outdoor environment temperature is 6 ℃, 1 ℃, 0 ℃, minus 5 ℃ and minus 15 ℃ respectively, the temperature of the inner coil pipe corresponding to each outdoor environment temperature is obtained, and the group of experiments are finished; fixing the rotating speed of the inner fan to be a middle wind speed gear, and repeating the experimental measurement process; the experimental process of the low wind speed gear is also analogized in turn.
Different outdoor environment temperatures can directly influence the frosting state of the air conditioner outdoor unit, namely, the frosting problem is judged whether to exist through the outdoor environment temperature detected by the outdoor sensor in the prior art. Therefore, the outdoor environment temperature set in the above experimental process can be roughly classified into two types, one is an outdoor environment temperature condition that can cause frosting of the outdoor unit, and the outdoor environment temperature condition is defined as a frosting condition; the other is an outdoor environment temperature condition which does not cause the frosting of the outdoor unit, and the outdoor environment temperature condition is defined as a non-frosting working condition; after the corresponding relation between each outdoor environment temperature and the temperature of the inner coil pipe is obtained under the condition of different inner machine rotating speeds, the corresponding relation between different outdoor environment temperature conditions and the temperature of the inner coil pipe can be further determined.
Therefore, through an experiment mode, the corresponding relation among the temperature of the inner coil, the rotating speed of the inner fan and the pre-judged working condition obtained according to the pre-experiment can be obtained.
Here, the correspondence relationship may be stored in a table form in a software system of the air conditioner, and may be called for query.
In the step S101, the temperature of the inner coil and the rotating speed of the inner fan are obtained, and the query result of the pre-determined working condition can be obtained based on the temperature of the inner coil and the rotating speed of the inner fan by searching the corresponding relationship.
And S103, responding to the matching result of the frosting working condition, and controlling the air conditioner to be switched to a defrosting mode.
The defrosting control method of the air conditioner can perform matching judgment of working conditions according to the internal machine operation parameters such as the temperature of the internal coil pipe, the rotating speed of the internal fan and the like, so that the air conditioner can be controlled to defrost the outdoor machine in time when the frosting problem of the air conditioner is judged to possibly exist; the judgment and control process of the defrosting control method does not depend on outdoor environment parameters, the defrosting process can be controlled only through the operation parameters of the indoor unit, the intellectualization of air conditioner control is improved, and the extra production cost caused by the configuration of an outdoor sensor is avoided.
As an alternative embodiment, the frosting condition comprises a plurality of frosting gears with the frosting degrees increasing in sequence; optionally, the frost formation range includes primary frost formation, medium frost formation and severe frost formation.
For example, different frosting gears correspond to different outdoor environment temperatures, the outdoor environment temperatures classified under the frosting working condition comprise 0 ℃, minus 5 ℃ and minus 15 ℃, and the outdoor environment temperatures are sequentially reduced, so that the frosting degree corresponding to each outdoor environment temperature is sequentially increased, and thus, the outdoor environment temperatures corresponding to the outdoor environment temperatures under the frosting working condition are sequentially divided into different frosting gears, for example, primary frosting is performed at 0 ℃, medium frosting is performed at 5 ℃ and severe frosting is performed at 15 ℃.
Thus, the control flow of the defrosting control method of the invention further comprises the following steps: determining a specific frosting gear under the frosting working condition according to the temperature of the inner coil and the rotating speed of the inner fan; and determining a defrosting parameter when the air conditioner is switched to a defrosting mode according to the frosting gear.
The specific frosting gear under the frosting working condition can be determined by inquiring the corresponding relation based on the temperature of the inner coil and the rotating speed of the inner fan.
The defrosting parameters when the air conditioner is switched to the defrosting mode include, but are not limited to: defrost duration, compressor frequency, throttle opening, etc.
For example, as an optional embodiment, the defrosting parameter is a defrosting time duration of the defrosting mode, the defrosting time duration corresponding to the primary frosting is 5min, the defrosting time duration corresponding to the medium frosting is 10min, and the defrosting time duration corresponding to the severe frosting is 20 min. Here, in the case of different frosting gears, the frosting degrees of the outdoor unit of the air conditioner are different, and the defrosting duration corresponding to the frosting gears in which the frosting degrees of the outdoor unit are sequentially increased is also sequentially prolonged, so that the defrosting mode of the air conditioner has enough duration to melt the frost condensed on the outdoor unit.
Therefore, through the control flow, the defrosting parameter of the defrosting mode of the air conditioner is adjusted to the parameter value matched with the frosting degree of the outdoor unit of the air conditioner in time, and the defrosting effect of the outdoor unit when the air conditioner runs in the defrosting mode is guaranteed.
As an alternative embodiment, the defrost control method further comprises: and responding to the matching result in the non-frosting working condition, and controlling and adjusting the current operation parameters of the air conditioner to slow down the trend of entering the frosting working condition.
In this embodiment, the outdoor ambient temperature corresponding to the non-frosting condition of the present invention is a plurality of temperature values whose temperature values are sequentially decreased, including a plurality of outdoor ambient temperature values adjacent to the frosting condition; if the outdoor environment temperature adjacent to the frosting condition is compared among the plurality of outdoor environment temperatures of the non-frosting condition obtained by matching in step S102, it is described that although the outdoor environment temperature does not cause frosting of the outdoor unit at present, the outdoor unit of the air conditioner has a tendency of entering the frosting condition because the outdoor environment temperature is low. Therefore, in order to reduce the tendency of the air conditioner to enter the frosting working condition and avoid the frosting problem, the defrosting control method can adjust the current operation parameters of the air conditioner after obtaining the matching result of the non-frosting working condition.
Here, the control adjusts the current operation parameter of the air conditioner, including one or more of the following: controlling to reduce the rotating speed of the inner fan, controlling to increase the throttle opening of the throttling device, controlling to increase the compression power of the compressor, and the like.
For example, the outdoor ambient temperature of the non-frosting condition obtained by matching in step S102 is 1 ℃, which is close to 0 ℃ of the frosting condition, and the air conditioner can control and increase the frequency of the compressor, increase the opening degree of the throttle valve, and increase the temperature and flow rate of the refrigerant input into the outdoor heat exchanger of the outdoor unit, thereby increasing the temperature of the outdoor heat exchanger to avoid the frosting problem of the outdoor unit.
Fig. 2 is a flowchart illustrating a defrost control method of an air conditioner according to another exemplary embodiment of the present invention.
As shown in fig. 2, the present invention provides another defrosting control method for an air conditioner, and the control flow of the control method may include:
s201, acquiring the temperature of an inner coil and the rotating speed of an inner fan when the air conditioner operates;
as an alternative embodiment, the coil position of the indoor heat exchanger of the air conditioner is provided with a temperature sensor, and the temperature sensor can be used for detecting the real-time temperature of the coil position; in step S201, the real-time temperature of the coil position detected by the temperature sensor is used as the temperature of the inner coil of the current control process.
As an alternative embodiment, the type of the driving device such as a motor configured for the air conditioner to drive the operation of the internal fan is determined information, and the rotating speed of the operation of the internal fan is related to parameters of the motor, such as voltage, current and the like; the current rotating speed of the inner fan can be obtained through conversion according to the model information, the operation parameters and the like of the motor.
S202, inquiring an external server to obtain outdoor environment parameters;
as an optional embodiment, the air conditioner can perform data communication with an external server through a wifi network, a mobile data network, and the like of a home of the user, where the external server can be an inquiry service platform erected by a production service provider of the air conditioner, and according to an inquiry instruction sent by the air conditioner to the inquiry service platform, the outdoor environment parameter of an area where the air conditioner of the user is located is searched and obtained, and is sent back to the air conditioner; and the air conditioner receives the outdoor environment parameters obtained by the query of the query service platform.
Here, the outdoor environment parameters include, but are not limited to: outdoor ambient temperature, outdoor ambient humidity, weather conditions, and the like. The outdoor environment parameters can be used for judging the frosting condition of the outdoor unit by the air conditioner.
S203, matching corresponding prejudgment working conditions from a preset incidence relation according to the temperature of the inner coil, the rotating speed of the inner fan and outdoor environment parameters;
the incidence relation is used for representing the corresponding relation among the temperature of the inner coil, the rotating speed of the inner fan, outdoor environment parameters and the prejudged working conditions which are obtained according to the prior experiment, wherein the prejudged working conditions at least comprise frosting working conditions and non-frosting working conditions;
as an alternative embodiment, the association relationship is also obtained through an experiment before the air conditioner leaves the factory, and the experimental process may refer to the description part in S102. Different from the incidence relation obtained in the step S102 in the previous embodiment, the correspondence relation stored in the previous embodiment is the correspondence relation among the temperature of the inner coil, the rotating speed of the inner fan, and the prejudged working condition, and in the actual operation process of the air conditioner, the prejudged working condition is obtained by matching the temperature of the inner coil and the rotating speed of the inner fan, but the prejudged working condition is obtained by back-pushing according to the incidence relation; therefore, the frosting possibility and the frosting degree are different from those of inland areas due to factors such as differences of user areas, for example, high environmental humidity of coastal areas and river areas, which do not necessarily correspond to real outdoor environment working conditions; therefore, in order to improve the judgment accuracy of the triggered defrosting mode, the invention also introduces outdoor environment parameters, and establishes the corresponding relation among the temperature of the inner coil, the rotating speed of the inner fan, the outdoor environment parameters and the pre-judged working condition through a pre-experiment.
And S204, responding to the matching result in the frosting working condition, and controlling the air conditioner to be switched to a defrosting mode.
The defrosting control method of the air conditioner can carry out matching judgment on the current working condition of the air conditioner according to the detected internal machine operation parameters such as the temperature of the internal coil pipe, the rotating speed of the internal fan and the like and the externally inquired outdoor environment parameters, so that the air conditioner can be controlled to defrost the outdoor unit in time when the frosting problem of the air conditioner is judged to possibly exist; the judgment and control process of the defrosting control method can realize the control of the defrosting process without depending on an outdoor unit sensor, thereby improving the intellectualization of air conditioner control and avoiding extra production cost caused by the configuration of the outdoor sensor.
As an alternative embodiment, the frosting condition comprises a plurality of frosting gears with the frosting degrees increasing in sequence; optionally, the frost formation range includes primary frost formation, medium frost formation and severe frost formation.
For example, different frosting gears correspond to different outdoor environment temperatures, the outdoor environment temperatures classified under the frosting working condition comprise 0 ℃, minus 5 ℃ and minus 15 ℃, and the outdoor environment temperatures are sequentially reduced, so that the frosting degree corresponding to each outdoor environment temperature is sequentially increased, and thus, the outdoor environment temperatures corresponding to the outdoor environment temperatures under the frosting working condition are sequentially divided into different frosting gears, for example, primary frosting is performed at 0 ℃, medium frosting is performed at 5 ℃ and severe frosting is performed at 15 ℃.
Thus, the control flow of the defrosting control method of the invention further comprises the following steps: determining a specific frosting gear under the frosting working condition according to the temperature of the inner coil and the rotating speed of the inner fan; and determining a defrosting parameter when the air conditioner is switched to a defrosting mode according to the frosting gear.
The specific frosting gear under the frosting working condition can be determined by inquiring the corresponding relation based on the temperature of the inner coil and the rotating speed of the inner fan.
The defrosting parameters when the air conditioner is switched to the defrosting mode include, but are not limited to: defrost duration, compressor frequency, throttle opening, etc.
For example, as an optional embodiment, the defrosting parameter is a defrosting time duration of the defrosting mode, the defrosting time duration corresponding to the primary frosting is 5min, the defrosting time duration corresponding to the medium frosting is 10min, and the defrosting time duration corresponding to the severe frosting is 20 min. Here, in the case of different frosting gears, the frosting degrees of the outdoor unit of the air conditioner are different, and the defrosting duration corresponding to the frosting gears in which the frosting degrees of the outdoor unit are sequentially increased is also sequentially prolonged, so that the defrosting mode of the air conditioner has enough duration to melt the frost condensed on the outdoor unit.
Therefore, through the control flow, the defrosting parameter of the defrosting mode of the air conditioner is adjusted to the parameter value matched with the frosting degree of the outdoor unit of the air conditioner in time, and the defrosting effect of the outdoor unit when the air conditioner runs in the defrosting mode is guaranteed.
As an alternative embodiment, the defrost control method further comprises: and responding to the matching result in the non-frosting working condition, and controlling and adjusting the current operation parameters of the air conditioner to slow down the trend of entering the frosting working condition.
In this embodiment, the outdoor ambient temperature corresponding to the non-frosting condition of the present invention is a plurality of temperature values whose temperature values are sequentially decreased, including a plurality of outdoor ambient temperature values adjacent to the frosting condition; if the outdoor environment temperature adjacent to the frosting condition is compared among the plurality of outdoor environment temperatures of the non-frosting condition obtained by matching in step S203, it is described that although the outdoor environment temperature does not cause frosting of the outdoor unit at present, the outdoor environment temperature is low, and therefore, the outdoor unit of the air conditioner tends to enter the frosting condition. Therefore, in order to reduce the tendency of the air conditioner to enter the frosting working condition and avoid the frosting problem, the defrosting control method can adjust the current operation parameters of the air conditioner after obtaining the matching result of the non-frosting working condition.
Here, the control adjusts the current operation parameter of the air conditioner, including one or more of the following: controlling to reduce the rotating speed of the inner fan, controlling to increase the throttle opening of the throttling device, controlling to increase the compression power of the compressor, and the like.
For example, the outdoor ambient temperature of the non-frosting condition obtained by matching in step S203 is 1 ℃, and is close to 0 ℃ of the frosting condition, and the air conditioner can control and increase the frequency of the compressor, increase the opening degree of the throttle valve, and increase the temperature and flow rate of the refrigerant input into the outdoor heat exchanger of the outdoor unit, so as to increase the temperature of the outdoor heat exchanger and avoid the frosting problem of the outdoor unit.
Fig. 3 is a flowchart illustrating a defrost control method of an air conditioner according to another exemplary embodiment of the present invention.
As shown in fig. 3, the present invention provides another defrosting control method for an air conditioner, and the control flow of the defrosting control method may include:
s301, acquiring the temperature of the inner coil pipe when the air conditioner operates, and determining the highest value in the temperature of the inner coil pipe;
as an alternative embodiment, the coil position of the indoor heat exchanger of the air conditioner is provided with a temperature sensor, and the temperature sensor can be used for detecting the real-time temperature of the coil position; in step S301, the real-time temperature of the coil position detected by the temperature sensor is used as the temperature of the inner coil of the current control process.
In this embodiment, in order to determine the maximum value of the temperature of the internal coil in step S301, the obtained temperature of the internal coil is within a first time period after the air conditioner is turned on, and a plurality of temperatures of the internal coil are obtained at a set detection frequency;
here, the first time period is 5min, and the detection frequency is set to 10 s/time.
In a first time period after the air conditioner is started, air conditioner components such as a compressor, a throttling device and the like are gradually started, so that the temperature of an inner coil of the air conditioner is fluctuated until a stable state is reached, and the overall temperature change in the process is gradually increased; the highest value of the temperature of the inner coil of the air conditioner is the highest heating performance which can be achieved by the cooperation of all the operation parameters of the air conditioner in the process that the air conditioner reaches a stable state, and the temperature of the inner coil of the air conditioner in the stable state is lower than the highest value.
In this embodiment, the plurality of inner coil temperatures are compared to obtain the highest value of the inner coil temperatures, for example, a total of 31 inner coil temperatures are detected within a first time period defined as 5min, and the 31 inner coil temperatures are compared with each other to obtain the highest value thereof.
S302, when the temperature of the inner coil is smaller than a set temperature value, controlling the air conditioner to switch to a defrosting mode;
here, the set temperature value is a difference between the maximum value and the set threshold value. In an embodiment, the highest value of the internal coil temperatures determined in step S301 is t1, the temperature value is set to t2, the threshold value is set to 10 ℃, and then the temperature value t2 is set to t 1-10.
The defrosting mode is not triggered within the first time length of the air conditioner starting, and after the highest value of the temperature of the inner coil is determined; the temperature sensor continues to detect the temperature of the inner coil pipe at a set detection frequency; the temperature of the inner coil compared with the set temperature value in step S302 is the temperature of the inner coil detected after the first time period ends, and if the condition that the temperature of the inner coil is less than the set temperature value t2 is met in the operation period after the first time period, the air conditioner is controlled to switch to the defrosting mode, so as to defrost the outdoor unit of the air conditioner.
According to the comparison result of the temperature of the inner coil and the set temperature value, whether the air conditioner is switched to the defrosting mode or not is determined, and the advantages that: the highest value of the temperature of the inner coil of the air conditioner is the highest heating performance which can be achieved by the cooperation of all the operation parameters of the air conditioner in the process that the air conditioner reaches a stable state, and the change of the temperature of the inner coil is influenced by the frosting condition of the outdoor unit, for example, when the outdoor unit is frosted seriously, the temperature of the inner coil is reduced; when the outdoor unit has no frosting problem, the air conditioner is in a stable state, and the temperature of the inner coil pipe is close to the highest value; therefore, whether the outdoor unit of the air conditioner has a frosting problem can be further deduced by judging the temperature difference between the maximum value and the real-time temperature of the inner coil pipe; here, when the temperature of the inner coil is less than the set temperature value, that is, the temperature difference between the temperature of the inner coil and the maximum value exceeds the set threshold, if the temperature difference exceeds 10 ℃, the current temperature of the inner coil of the air conditioner is less than the maximum value and exceeds 10 ℃, the decrease range of the temperature of the inner coil is relatively large, so that it can be judged that the temperature of the inner coil decreases due to the frosting problem, and the defrosting process needs to be performed on the outdoor unit of the air conditioner in time.
As an alternative embodiment, the defrost control method further comprises: counting the duration when the temperature of the inner coil is less than a set temperature value; and when the duration is less than the set duration, controlling the air conditioner to switch to the defrosting mode.
When the temperature of the inner coil pipe is less than the set temperature value, the air conditioner starts timing; in the timing process, if the temperature of the inner coil pipe fluctuates and changes into a temperature value not less than the set temperature value, timing is stopped, the duration time when the temperature of the inner coil pipe is less than the set temperature value is obtained and is compared with the set duration time, and if the duration time is less than the set duration time, the air conditioner can be controlled to be switched to the defrosting mode; and if the duration is not less than the set duration, controlling the air conditioner not to be switched to the defrosting mode, and still maintaining the current running state, such as still maintaining the air conditioner running heating mode.
Preferably, the set duration is 3 min.
As an alternative embodiment, the defrost control method further comprises: and determining a set threshold according to a preset incidence relation and the highest value, wherein the incidence relation is used for representing the corresponding relation between the highest value and the set threshold.
Here, the maximum value and the set threshold value are in an inverse proportion corresponding relationship, that is, the maximum value with a larger numerical value also has a smaller corresponding set threshold value; the smaller the value of the maximum value, the larger the corresponding set threshold value.
The maximum value of the temperature of the inner coil can reflect the maximum heating performance of the air conditioner in the current operation mode, and under the condition that the heating performance of the air conditioner is high, the heat absorbed by the air conditioner from the outdoor environment is high during the operation of the air conditioner, so that the temperature drop amplitude of the peripheral side of the outdoor heat exchanger is large, and the temperature environment easy to condense frost is easy to generate.
Fig. 4 is a flowchart illustrating a defrost control method of an air conditioner according to another exemplary embodiment of the present invention.
As shown in fig. 4, the present invention provides another defrosting control method for an air conditioner, wherein a control flow of the defrosting control method includes:
s401, acquiring the temperature of the inner coil pipe when the air conditioner operates, and determining the highest value in the temperature of the inner coil pipe;
in this embodiment, the obtaining manner of the temperature of the inner coil and the determining manner of the highest value of the temperature of the inner coil may refer to step S301 in the previous embodiment, which is not described herein again.
S402, when the temperature of the inner coil is smaller than a set temperature value, counting the duration when the temperature of the inner coil is smaller than the set temperature value;
in this embodiment, the set temperature value is the difference between the maximum value and the set threshold value;
when the temperature of the inner coil pipe is less than the set temperature value, the air conditioner starts timing; in the timing process, if the temperature of the inner coil pipe fluctuates and becomes a temperature value not less than the set temperature value, timing is stopped, and the duration when the temperature of the inner coil pipe is less than the set temperature value is obtained.
And S403, controlling the air conditioner to switch to the defrosting mode when the time length difference between the duration time length and the set time length is greater than the set time length difference.
The set time length and the set time length difference can be used for representing and deducing the frosting state of the outdoor unit of the air conditioner, and when the time length difference between the duration time length and the set time length is greater than the set time length difference, the current outdoor environment condition is relatively severe, and the frosting degree of the outdoor unit is relatively serious; and under the condition that the time length difference between the duration time and the set time length is not more than the set time length difference, the current outdoor environment condition is relatively good, and the outdoor unit frosting degree is relatively light.
In this way, by comparing the time length difference between the duration time and the set time length with the set time length difference, the judgment result of the frosting state of the outdoor unit can be obtained, and whether the defrosting treatment needs to be carried out on the outdoor unit of the air conditioner can be further considered.
For example, if the duration is T1, the set duration is T2, and the set duration difference is 0.5min, the air conditioner switches to the defrosting mode operation when T1-T > 0.5 min; and when the time T1-T is less than or equal to 0.5min, the air conditioner keeps the current running state unchanged, such as the running in a heating mode.
As still another alternative embodiment, the defrost control method further comprises: counting the accumulated operation time of the air conditioner; here, the counted accumulated operation time length of the air conditioner is the accumulated time length after the current startup operation of the air conditioner, and the accumulated operation time length is cleared when the air conditioner is turned off.
Like this, when the duration is greater than the length of time difference of setting for the length of time difference during duration and the length of time difference of setting for, control air conditioner switches to defrosting mode, specifically includes: when the accumulated running time of the air conditioner is less than or equal to the set accumulated time and the time difference between the duration time and the set time is greater than the set time difference, controlling the air conditioner to be switched to a defrosting mode;
in this embodiment, the defrosting control method further includes: and when the accumulated running time of the air conditioner is longer than the set accumulated time and the duration time is shorter than the set duration time, controlling the air conditioner to switch to the defrosting mode.
Therefore, when the accumulated operation time of the air conditioner is in different time periods (taking the set accumulated time as a boundary), different judgment conditions are adopted for judgment respectively, so that the problem of residual frost caused by the extension of the total operation time of the air conditioner can be fully considered, and the air conditioner can be switched to the judgment condition which is more accurate in judgment to judge whether the air conditioner is switched to the defrosting mode or not under the condition that the accumulated operation time of the air conditioner is longer.
Preferably, the set duration is 3 min.
As an alternative embodiment, the defrost control method further comprises: and determining a set threshold according to a preset incidence relation and the highest value, wherein the incidence relation is used for representing the corresponding relation between the highest value and the set threshold.
Here, the maximum value and the set threshold value are in an inverse proportion corresponding relationship, that is, the maximum value with a larger numerical value also has a smaller corresponding set threshold value; the smaller the value of the maximum value, the larger the corresponding set threshold value.
The maximum value of the temperature of the inner coil can reflect the maximum heating performance of the air conditioner in the current operation mode, and under the condition that the heating performance of the air conditioner is high, the heat absorbed by the air conditioner from the outdoor environment is high during the operation of the air conditioner, so that the temperature drop amplitude of the peripheral side of the outdoor heat exchanger is large, and the temperature environment easy to condense frost is easy to generate.
Fig. 5 is a flowchart illustrating a defrost control method of an air conditioner according to another exemplary embodiment of the present invention.
As shown in fig. 5, the present invention provides another defrosting control method for an air conditioner, wherein a control flow of the defrosting control method includes:
s501, acquiring the temperature of an inner coil pipe and the rotating speed of an inner fan when the air conditioner operates;
as an alternative embodiment, the coil position of the indoor heat exchanger of the air conditioner is provided with a temperature sensor, and the temperature sensor can be used for detecting the real-time temperature of the coil position; in step S501, the real-time temperature of the coil position detected by the temperature sensor is used as the temperature of the inner coil of the current control process.
As an alternative embodiment, the type of the driving device such as a motor configured for the air conditioner to drive the operation of the internal fan is determined information, and the rotating speed of the operation of the internal fan is related to parameters of the motor, such as voltage, current and the like; the current rotating speed of the inner fan can be obtained through conversion according to the model information, the operation parameters and the like of the motor.
S502, determining defrosting duration according to the temperature of the inner coil and the air speed of the inner fan;
as an optional embodiment, the corresponding defrosting time is matched from a preset incidence relation according to the temperature of the inner coil and the rotating speed of the inner fan, and the incidence relation is used for representing the corresponding relation among the temperature of the inner coil, the wind speed of the inner fan and the defrosting time obtained according to a previous experiment.
Here, the air conditioner may obtain the corresponding relationship between the temperature of the inner coil, the rotating speed of the inner fan, and the pre-determined working condition through a pre-experiment before leaving the factory, as described in the embodiment shown in fig. 1; after the working condition is judged in advance, the defrosting time duration required by different frosting gears of the frosting working condition can be determined, and if the defrosting time duration required by primary frosting is short, the defrosting time duration can be set to be 5 min; the defrosting time period required for severe frosting is long, and the defrosting time period can be set to be 20 min.
Therefore, through further experiments, the defrosting time lengths corresponding to different frosting gears can be determined. Therefore, the corresponding relation among the temperature of the inner coil, the rotating speed of the inner fan and the pre-judged working condition is combined with the corresponding relation among the frosting gear and the defrosting time, and the corresponding relation among the temperature of the inner coil, the wind speed of the inner fan and the defrosting time can be obtained.
And S503, when the air conditioner meets the defrosting triggering condition, controlling the air conditioner to operate the defrosting mode in a defrosting time length.
As an optional embodiment, the defrosting triggering condition in step S503 may be a condition defined in the steps of the foregoing embodiments, for example, the defrosting triggering condition is a matching result of the frosting condition, so that the defrosting duration may be determined according to the temperature of the inner coil and the rotation speed of the inner fan, and meanwhile, the defrosting triggering condition may also be used as a determination factor for determining whether the defrosting triggering condition is satisfied; the present invention is not limited thereto.
The defrosting control method of the air conditioner can determine the defrosting mode running time of the air conditioner according to the internal machine running parameters such as the temperature of the internal coil pipe, the rotating speed of the internal fan and the like, so that when the frosting problem of the air conditioner is judged to possibly exist, the air conditioner can be controlled in time to defrost the outdoor unit according to the determined defrosting time; the defrosting time of the defrosting control method does not depend on outdoor environment parameters, the defrosting process can be controlled only through the operation parameters of the indoor unit, the intellectualization of air conditioner control is improved, and the extra production cost caused by the configuration of an outdoor sensor is avoided.
As an alternative embodiment, the defrost trigger condition may be that the inner coil temperature is less than a set temperature value, which is the difference between the maximum value and a set threshold value.
Therefore, the step of the defrost control method further comprises: determining the highest value in the temperature of the inner coil; and when the temperature of the inner coil is less than the set temperature value, namely the defrosting triggering condition is judged to be met, controlling the air conditioner to be switched to a defrosting mode.
Specifically, in order to determine the highest value of the temperature of the internal coil, the obtained temperature of the internal coil is within a first time length after the air conditioner is started, and a plurality of temperatures of the internal coil are obtained at a set detection frequency;
here, the first time period is 5min, and the detection frequency is set to 10 s/time.
In a first time period after the air conditioner is started, air conditioner components such as a compressor, a throttling device and the like are gradually started, so that the temperature of an inner coil of the air conditioner is fluctuated until a stable state is reached, and the overall temperature change in the process is gradually increased; the highest value of the temperature of the inner coil of the air conditioner is the highest heating performance which can be achieved by the cooperation of all the operation parameters of the air conditioner in the process that the air conditioner reaches a stable state, and the temperature of the inner coil of the air conditioner in the stable state is lower than the highest value.
In this embodiment, the plurality of inner coil temperatures are compared to obtain the highest value of the inner coil temperatures, for example, a total of 31 inner coil temperatures are detected within a first time period defined as 5min, and the 31 inner coil temperatures are compared with each other to obtain the highest value thereof.
As an optional embodiment, the wind speed gear has a certain influence on the maximum value of the temperature of the inner coil, the wind speed gear can change the heat dissipation capacity of the air conditioner to the indoor environment, the higher the wind speed gear is, the more the heat dissipation capacity of the air conditioner to the indoor environment is, the less the heat of the refrigerant flowing back to the outdoor unit through the indoor unit is, and the outdoor unit is more prone to frosting; and the lower the wind speed gear is, the more difficult the outdoor unit frosts, so, in order to reduce the deviation influence on judging whether frosting occurs because of the wind speed gear, the defrosting control method of the invention also includes: correcting the highest value in the temperature of the inner coil according to the rotating speed of the inner fan; therefore, the set temperature value is the difference between the corrected maximum value and the set threshold value.
Specifically, the correction for the maximum value of the temperature of the inner coil may include:
when the rotating speed of the inner fan is in a set high wind gear range, the highest value is unchanged; when the rotating speed of the inner fan is within a set high wind gear range, the highest value obtained by comparing the temperatures of the plurality of inner coils can be used as a parameter for calculating a set temperature value;
when the rotating speed of the inner fan is within the set middle wind gear range, the corrected highest value is the difference between the highest value before correction and the first correction value; here, if the first correction value is 1 ℃, and the maximum value before correction is t1, the maximum value after correction t 1' is t 1-1.
When the rotating speed of the inner fan is within the set low wind gear range, the corrected highest value is the difference between the highest value before correction and the second correction value; here, when the second correction value is 2 ℃, and the maximum value before correction is t1, the maximum value after correction t 1' is t 1-2.
The lower the wind speed gear is, the more the heat of the refrigerant flowing through the outdoor heat exchanger is increased, and the lower the temperature critical value of the frosting temperature generated by the outdoor unit is, so that the lower the set temperature value obtained by calculating the corrected maximum value is, and the set temperature value is matched with the judgment of the actual frosting working condition. Therefore, the first correction value of the present invention is smaller than the second correction value.
Fig. 6 is a block diagram illustrating a structure of a defrosting control apparatus of an air conditioner according to the present invention according to an exemplary embodiment.
As shown in fig. 6, the present invention also provides a defrosting control device of an air conditioner, which can be used to control the air conditioner to perform the defrosting process shown in the embodiment of fig. 1; the defrosting control means 600 includes:
the acquiring unit 610 is used for acquiring the temperature of the inner coil and the rotating speed of the inner fan when the air conditioner operates;
the matching unit 620 is used for matching a corresponding prejudged working condition from a preset incidence relation according to the temperature of the inner coil and the rotating speed of the inner fan, wherein the incidence relation is used for representing the corresponding relation among the temperature of the inner coil, the rotating speed of the inner fan and the prejudged working condition obtained according to a pre-experiment, and the prejudged working condition at least comprises a frosting working condition and a non-frosting working condition;
and the response unit 630 is used for controlling the air conditioner to switch to the defrosting mode in response to the matching result of the frosting condition.
As an alternative embodiment, the frosting condition comprises a plurality of frosting gears with the frosting degrees increasing in sequence;
the defrosting control device further comprises a determining unit 640, which is used for determining a specific frosting gear under the frosting working condition according to the temperature of the inner coil and the rotating speed of the inner fan; and the number of the first and second groups,
according to the frosting gear, the defrosting parameter when the response unit 630 controls the air conditioner to switch to the defrosting mode is determined.
As an alternative embodiment, the frost formation stage includes primary, medium and severe frost formation.
As an alternative embodiment, the response unit 630 is further configured to: and responding to the matching result in the non-frosting working condition, and controlling and adjusting the current operation parameters of the air conditioner to slow down the trend of entering the frosting working condition.
As an alternative embodiment, the response unit 630 controls and adjusts the current operation parameters of the air conditioner, including one or more of the following: the rotating speed of the inner fan is controlled to be reduced, the throttle opening of the throttling device is controlled to be improved, and the compression power of the compressor is controlled to be improved.
Fig. 7 is a block diagram illustrating a structure of a defrosting control apparatus of an air conditioner according to the present invention, according to still another exemplary embodiment.
The present invention also provides a defrosting control device of an air conditioner, which can be used to control the air conditioner to execute the defrosting process shown in the embodiment of fig. 2; the defrosting control means 700 includes:
an obtaining unit 710, configured to obtain a temperature of an inner coil and a rotation speed of an inner fan during operation of an air conditioner;
an inquiring unit 720, configured to inquire the external server to obtain an outdoor environment parameter;
the matching unit 730 is used for matching a corresponding prejudged working condition from a preset incidence relation according to the temperature of the inner coil, the rotating speed of the inner fan and the outdoor environment parameter, wherein the incidence relation is used for representing the corresponding relation among the temperature of the inner coil, the rotating speed of the inner fan, the outdoor environment parameter and the prejudged working condition obtained according to a pre-experiment, and the prejudged working condition at least comprises a frosting working condition and a non-frosting working condition;
and the response unit 740 is used for controlling the air conditioner to be switched to the defrosting mode in response to the matching result in the frosting working condition.
As an alternative embodiment, the frosting condition comprises a plurality of frosting gears with the frosting degrees increasing in sequence;
the defrosting control device further comprises a determining unit 750, which is used for determining a specific frosting gear under the frosting working condition according to the temperature of the inner coil and the rotating speed of the inner fan; and the number of the first and second groups,
according to the frosting gear, the defrosting parameter when the response unit 740 controls the air conditioner to switch to the defrosting mode is determined.
As an alternative embodiment, the frost formation stage includes primary, medium and severe frost formation.
As an alternative embodiment, the response unit 740 is further configured to: and responding to the matching result in the non-frosting working condition, and controlling and adjusting the current operation parameters of the air conditioner to slow down the trend of entering the frosting working condition.
As an alternative embodiment, the response unit 740 controls and adjusts the current operation parameters of the air conditioner, including one or more of the following: the rotating speed of the inner fan is controlled to be reduced, the throttle opening of the throttling device is controlled to be improved, and the compression power of the compressor is controlled to be improved.
Fig. 8 is a block diagram illustrating a structure of a defrosting control apparatus of an air conditioner according to the present invention, according to still another exemplary embodiment.
The present invention also provides a defrosting control device of an air conditioner, which can be used to control the air conditioner to execute the defrosting process shown in the embodiment of fig. 3; the defrosting control means 800 includes:
an obtaining unit 810, configured to obtain the temperature of the internal coil pipe when the air conditioner operates, and determine a highest value of the temperature of the internal coil pipe;
and the control unit 820 is used for controlling the air conditioner to switch to the defrosting mode when the temperature of the inner coil pipe is less than a set temperature value, wherein the set temperature value is the difference between the maximum value and the set threshold value.
As an alternative embodiment, the defrosting control unit 800 further includes:
the statistical unit 830 is configured to count a duration when the temperature of the inner coil is less than a set temperature value;
the control unit 820 is used for controlling the air conditioner to switch to the defrosting mode when the duration is less than the set duration.
As an optional embodiment, the obtaining unit 810 is specifically configured to:
within a first time length after the air conditioner is started, acquiring the temperatures of a plurality of inner coils at a set detection frequency;
and comparing the temperatures of the plurality of inner coils to obtain the highest value of the temperatures of the inner coils.
As an alternative embodiment, the duration is set to 3 min.
As an alternative embodiment, the defrost control apparatus 800 further comprises a determination unit 840 for:
and determining a set threshold according to a preset incidence relation and the highest value, wherein the incidence relation is used for representing the corresponding relation between the highest value and the set threshold.
Fig. 9 is a block diagram illustrating a structure of a defrosting control apparatus of an air conditioner according to the present invention, according to still another exemplary embodiment.
The present invention also provides a defrosting control device of an air conditioner, which can be used for controlling the air conditioner to execute the defrosting process shown in the embodiment of fig. 4; the defrosting control means 900 includes:
an obtaining unit 910, configured to obtain the temperature of the internal coil pipe during operation of the air conditioner, and determine a highest value of the temperature of the internal coil pipe;
a counting unit 920, configured to count a duration when the temperature of the internal coil pipe is less than a set temperature value, where the set temperature value is a difference between a maximum value and a set threshold value;
and a first control unit 930 configured to control the air conditioner to switch to the defrosting mode when a time length difference between the duration time and the set time length is greater than the set time length difference.
As an alternative embodiment, the defrosting control means 900 further includes: the accumulation unit is used for counting the accumulated running time of the air conditioner;
the first control unit 930 is specifically configured to: when the accumulated running time of the air conditioner is less than or equal to the set accumulated time and the time difference between the duration time and the set time is greater than the set time difference, controlling the air conditioner to be switched to a defrosting mode;
the defrost control apparatus 900 further includes a second control unit 940 for:
and when the accumulated running time of the air conditioner is longer than the set accumulated time and the duration time is shorter than the set duration time, controlling the air conditioner to switch to the defrosting mode.
As an optional embodiment, the obtaining unit 910 is specifically configured to:
acquiring the temperatures of a plurality of inner coils at a set detection frequency within a set time length after the air conditioner is started;
and comparing the temperatures of the plurality of inner coils to obtain the highest value of the temperatures of the inner coils.
As an alternative embodiment, the duration is set to 3 min.
As an alternative embodiment, the defrost control 900 further comprises a determination unit 950 for: and determining a set threshold according to a preset incidence relation and the highest value, wherein the incidence relation is used for representing the corresponding relation between the highest value and the set threshold.
Fig. 10 is a block diagram illustrating a structure of a defrosting control apparatus of an air conditioner according to the present invention, according to still another exemplary embodiment.
The present invention also provides a defrosting control device of an air conditioner, which can be used for controlling the air conditioner to execute the defrosting process shown in the embodiment of fig. 5; the defrosting control means 1000 includes:
the acquiring unit 1010 is used for acquiring the temperature of the inner coil and the rotating speed of the inner fan during the operation of the air conditioner;
a first determining unit 1020, configured to determine a defrosting duration according to the temperature of the inner coil and the air speed of the inner fan;
and a control unit 1030 configured to control the air conditioner to operate the defrosting mode for a defrosting duration when the air conditioner satisfies a defrosting trigger condition.
As an alternative embodiment, the defrosting control means 1000 further includes:
a second determination unit 1040 for determining the highest value of the inner coil temperature;
the control unit 1030 is specifically configured to control the air conditioner to switch to the defrosting mode when the temperature of the inner coil is less than a set temperature value, where the set temperature value is a difference between a maximum value and a set threshold value.
As an alternative embodiment, the defrosting control means 1000 further includes:
the correcting unit 1050 is used for correcting the highest value in the temperature of the inner coil according to the rotating speed of the inner fan;
the set temperature value is the difference between the corrected maximum value and the set threshold value.
As an alternative embodiment, the correction unit 1050 is specifically configured to:
when the rotating speed of the inner fan is within the set middle wind gear range, the corrected highest value is the difference between the highest value before correction and the first correction value;
when the rotating speed of the inner fan is within the set low wind gear range, the corrected highest value is the difference between the highest value before correction and the second correction value;
wherein the first correction value is less than the second correction value.
As an optional embodiment, the first determining unit 1020 is specifically configured to: and matching corresponding defrosting time length from a preset incidence relation according to the temperature of the inner coil and the rotating speed of the inner fan, wherein the incidence relation is used for representing the corresponding relation among the temperature of the inner coil, the wind speed of the inner fan and the defrosting time length obtained according to a pre-experiment.
It is to be understood that the present invention is not limited to the procedures and structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims (10)

1. A defrosting control method of an air conditioner, characterized by comprising:
acquiring the temperature of an inner coil pipe and the rotating speed of an inner fan when the air conditioner operates;
determining defrosting duration according to the temperature of the inner coil and the air speed of the inner fan;
and when the air conditioner meets the defrosting triggering condition, controlling the air conditioner to operate the defrosting mode in the defrosting time length.
2. The defrost control method of claim 1, further comprising:
determining a highest value of the inner coil temperature;
and when the temperature of the inner coil is lower than a set temperature value, controlling the air conditioner to switch to a defrosting mode, wherein the set temperature value is the difference between the highest value and a set threshold value.
3. The defrost control method of claim 2, further comprising:
correcting the highest value in the temperature of the inner coil according to the rotating speed of the inner fan;
the set temperature value is the difference between the corrected maximum value and the set threshold value.
4. The defrost control method of claim 3, wherein said correcting a highest value of the inner coil temperature based on the inner fan speed comprises:
when the rotating speed of the inner fan is within a set middle wind gear range, the corrected highest value is the difference between the highest value before correction and a first correction value;
when the rotating speed of the inner fan is within a set low wind gear range, the corrected highest value is the difference between the highest value before correction and a second correction value;
wherein the first correction value is less than the second correction value.
5. The defrost control method of claim 1, wherein said determining a defrost duration based on said controlling the inner coil temperature and the inner fan speed comprises:
and matching corresponding defrosting time length from a preset incidence relation according to the temperature of the inner coil and the rotating speed of the inner fan, wherein the incidence relation is used for representing the corresponding relation among the temperature of the inner coil, the wind speed of the inner fan and the defrosting time length obtained according to a pre-experiment.
6. A defrosting control apparatus of an air conditioner, characterized in that the defrosting control apparatus comprises:
the acquiring unit is used for acquiring the temperature of the inner coil pipe and the rotating speed of the inner fan when the air conditioner operates;
the first determining unit is used for determining defrosting duration according to the temperature of the control inner coil and the air speed of the inner fan;
and the control unit is used for controlling the air conditioner to operate a defrosting mode in the defrosting time length when the air conditioner meets the defrosting triggering condition.
7. The defrost control device of claim 6, further comprising:
the second determination unit is used for determining the highest value in the temperature of the inner coil;
the control unit is specifically configured to control the air conditioner to switch to a defrosting mode when the temperature of the inner coil is less than a set temperature value, where the set temperature value is a difference between the maximum value and a set threshold value.
8. The defrost control of claim 7, further comprising:
the correcting unit is used for correcting the highest value in the temperature of the inner coil according to the rotating speed of the inner fan;
the set temperature value is the difference between the corrected maximum value and the set threshold value.
9. Defrost control apparatus according to claim 3, wherein the correction unit is specifically configured to:
when the rotating speed of the inner fan is within a set middle wind gear range, the corrected highest value is the difference between the highest value before correction and a first correction value;
when the rotating speed of the inner fan is within a set low wind gear range, the corrected highest value is the difference between the highest value before correction and a second correction value;
wherein the first correction value is less than the second correction value.
10. The defrost control apparatus of claim 6, wherein the first determination unit is specifically configured to:
and matching corresponding defrosting time length from a preset incidence relation according to the temperature of the inner coil and the rotating speed of the inner fan, wherein the incidence relation is used for representing the corresponding relation among the temperature of the inner coil, the wind speed of the inner fan and the defrosting time length obtained according to a pre-experiment.
CN201810664229.3A 2018-06-25 2018-06-25 Defrosting control method and device for air conditioner Pending CN110631206A (en)

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Application publication date: 20191231