CN110873418B - Air conditioner and self-cleaning control method thereof - Google Patents

Air conditioner and self-cleaning control method thereof Download PDF

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Publication number
CN110873418B
CN110873418B CN201811007084.6A CN201811007084A CN110873418B CN 110873418 B CN110873418 B CN 110873418B CN 201811007084 A CN201811007084 A CN 201811007084A CN 110873418 B CN110873418 B CN 110873418B
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China
Prior art keywords
temperature
fan
frost
air conditioner
rotating speed
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CN110873418A (en
Inventor
许文明
罗荣邦
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Qingdao Haier Air Conditioner Gen Corp Ltd
Haier Smart Home Co Ltd
Chongqing Haier Air Conditioner Co Ltd
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Qingdao Haier Air Conditioner Gen Corp Ltd
Haier Smart Home Co Ltd
Chongqing Haier Air Conditioner Co Ltd
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Publication of CN110873418A publication Critical patent/CN110873418A/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
    • 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
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/22—Cleaning ducts or apparatus

Abstract

The invention discloses an air conditioner and a self-cleaning control method thereof, and belongs to the technical field of air conditioners. The control method comprises the following steps: acquiring the temperature of a coil pipe in a frost condensation stage of a self-cleaning mode of air conditioner operation; and adjusting the rotating speed of the fan based on the temperature comparison result of the coil temperature and the frost critical temperature. The control method for self-cleaning of the air conditioner provided by the invention can adjust the rotating speed of the fan in the frost condensation stage based on the temperature comparison result of the coil pipe temperature and the frost condensation critical temperature, is different from the existing running mode that the fan is stopped or the rotating speed is fixed, and the rotating speed of the fan which is dynamically adjusted can be more matched with the temperature change in the air conditioner, so that the frost condensation rate in the frost condensation stage is accelerated by utilizing the changed rotating speed, the actual frost condensation amount is improved, and the actual cleaning effect of the self-cleaning mode is ensured.

Description

Air conditioner and self-cleaning control method thereof
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner and a self-cleaning control method thereof.
Background
When the air conditioner operates in a cooling or heating mode, air in an external environment enters the inside of the machine body along the air inlet, and is blown into the external environment again through the air outlet after heat exchange of the heat exchange plate, in the process, impurities such as dust, large particles and the like mixed in the air can enter the indoor machine along with air inlet flow, although a dustproof filter screen arranged at the air inlet of the air conditioner can filter most of the dust and the particles, a small amount of tiny dust can not be completely blocked and filtered, and the dust can be gradually deposited and attached to the surface of the heat exchange plate along with long-term use of the air conditioner.
Generally, a cleaning method of an air conditioner in the prior art mainly includes two modes of manual cleaning and self cleaning of the air conditioner, wherein the self cleaning mode of the air conditioner is mainly divided into a frost condensation stage and a defrosting stage, wherein, taking an indoor unit of a split air conditioner as an example, in the frost condensation stage, the air conditioner firstly operates in a refrigeration mode, and increases refrigerant output quantity to an indoor heat exchanger, so that moisture in indoor air can be gradually condensed into a frost or ice layer on the outer surface of the heat exchanger, and in the process, the condensed frost layer can be combined with dust, so that the dust is peeled off from the outer surface of the heat exchanger; then, in the defrosting stage, the air conditioner operates in a heating mode to melt the frost layer condensed on the outer surface of the heat exchanger, and dust can be collected into the water receiving tray along with the melted water flow, so that the aim of self-cleaning the indoor unit of the air conditioner can be fulfilled; similarly, when the outdoor unit of the split air conditioner is cleaned, the self-cleaning operation is performed according to a reverse flow to that of the indoor unit, that is, the air conditioner operates the heating mode (the temperature of the outdoor unit is reduced, and the frost is condensed) and then operates the cooling mode (the temperature of the outdoor unit is increased, and the frost is melted).
However, in the existing self-cleaning mode flow, the fan in the frost condensation stage generally stops operating or operates at a set wind speed, and after a large amount of user use data is collected, it is found that the actual frost condensation effect of the fan setting mode in the self-cleaning mode is not good, which affects the cleaning effect of the self-cleaning mode of the air conditioner.
Disclosure of Invention
The invention provides an air conditioner and a self-cleaning control method thereof, aiming at solving the problem of poor self-cleaning effect caused by the adoption of the setting mode of a fan. 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 control method of self-cleaning of an air conditioner, the control method comprising:
acquiring the temperature of a coil pipe in a frost condensation stage of a self-cleaning mode of air conditioner operation;
and adjusting the rotating speed of the fan based on the temperature comparison result of the coil temperature and the frost critical temperature.
In an alternative embodiment, the fan has at least two wind ranges with successively increasing rotational speed;
based on the temperature comparison result of coil pipe temperature and frost critical temperature, adjust the rotational speed of fan, include:
and when the temperature of the coil pipe is higher than the frost-condensation critical temperature, controlling the fan to operate at a set low wind gear.
In an alternative embodiment, the adjusting the rotation speed of the fan based on the temperature comparison result between the coil temperature and the frost critical temperature further comprises:
and when the temperature of the coil pipe is less than the frost critical temperature and the temperature difference value between the frost critical temperature and the temperature of the coil pipe is less than a preset temperature difference threshold value, controlling the fan to reduce the rotating speed value corresponding to the low wind gear to a target rotating speed value.
In an optional embodiment, the control method further comprises:
acquiring the current indoor temperature of a frosting stage of an air conditioner operation self-cleaning mode;
determining a preset temperature difference threshold value based on the current indoor temperature and a preset rule; the preset rule is used for representing the corresponding relation between the current indoor temperature and the temperature difference threshold value.
In an alternative embodiment, the adjusting the rotation speed of the fan based on the temperature comparison result between the coil temperature and the frost critical temperature further comprises:
and when the temperature difference value between the frost critical temperature and the temperature of the coil pipe is greater than a preset temperature difference threshold value, controlling the fan to operate at a set low wind gear.
According to the second aspect of the present invention, there is also provided an air conditioner comprising a machine body and a controller, wherein the controller is configured to:
acquiring the temperature of a coil pipe in a frost condensation stage of a self-cleaning mode of air conditioner operation;
and adjusting the rotating speed of the fan based on the temperature comparison result of the coil temperature and the frost critical temperature.
In an alternative embodiment, the fan has at least two wind ranges with successively increasing rotational speed;
the controller is specifically configured to:
and when the temperature of the coil pipe is higher than the frost-condensation critical temperature, controlling the fan to operate at a set low wind gear.
In an alternative embodiment, the controller is specifically configured to:
and when the temperature of the coil pipe is less than the frost critical temperature and the temperature difference value between the frost critical temperature and the temperature of the coil pipe is less than a preset temperature difference threshold value, controlling the fan to reduce the rotating speed value corresponding to the low wind gear to a target rotating speed value.
In an alternative embodiment, the controller is further configured to:
acquiring the current indoor temperature of a frosting stage of an air conditioner operation self-cleaning mode;
determining a preset temperature difference threshold value based on the current indoor temperature and a preset rule; the preset rule is used for representing the corresponding relation between the current indoor temperature and the temperature difference threshold value.
In an alternative embodiment, the controller is specifically configured to:
and when the temperature difference value between the frost critical temperature and the temperature of the coil pipe is greater than a preset temperature difference threshold value, controlling the fan to operate at a set low wind gear.
The invention adopts the technical scheme and has the beneficial effects that:
the control method for self-cleaning of the air conditioner provided by the invention can adjust the rotating speed of the fan in the frost condensation stage based on the temperature comparison result of the coil pipe temperature and the frost condensation critical temperature, is different from the existing running mode that the fan is stopped or the rotating speed is fixed, and the rotating speed of the fan which is dynamically adjusted can be more matched with the temperature change in the air conditioner, so that the frost condensation rate in the frost condensation stage is accelerated by utilizing the changed rotating speed, the actual frost condensation amount is improved, and the actual cleaning effect of the self-cleaning mode is ensured.
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
Fig. 1 is a first flowchart illustrating a self-cleaning control method of an air conditioner according to an exemplary embodiment of the present invention;
FIG. 2 is a second flowchart illustrating a self-cleaning control method of an air conditioner according to another exemplary embodiment of the present invention;
fig. 3 is a third flowchart illustrating a control method of self-cleaning of an air conditioner according to another exemplary embodiment of the present invention;
fig. 4 is a fourth flowchart illustrating a control method of self-cleaning of an air conditioner according to another exemplary embodiment of the present invention;
fig. 5 is a fifth flowchart illustrating a control method of self-cleaning of an air conditioner according to another exemplary embodiment of the present invention;
fig. 6 is a sixth flowchart illustrating a control method of self-cleaning of an air conditioner according to another exemplary embodiment of the present invention;
fig. 7 is a seventh flowchart illustrating a control method of self-cleaning of an air conditioner according to another exemplary embodiment of the present invention;
fig. 8 is a flowchart illustrating an eighth method for controlling self-cleaning of an air conditioner according to another exemplary embodiment of the present invention.
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 air conditioner comprises an indoor heat exchanger, an outdoor heat exchanger, a throttling device and a compressor, wherein the indoor heat exchanger, the outdoor heat exchanger, the throttling device and the compressor are connected through refrigerant pipelines to form a refrigerant circulation loop, and refrigerant flows along the set flow directions of different operation modes through the refrigerant circulation loop, so that the functions of heating, refrigerating, self-cleaning and the like are realized.
In an embodiment, the operation modes of the air conditioner comprise a refrigeration mode, a heating mode and a self-cleaning mode, wherein the refrigeration mode is generally applied to a high-temperature working condition in summer and used for reducing the indoor environment temperature; the heating mode is generally applied to the low-temperature working condition in winter and is used for increasing the indoor environment temperature; the self-cleaning mode is generally a user's self-selection function mode or self-starting function, and can automatically clean the heat exchanger under the condition that dust and dirt are accumulated on the heat exchanger.
When the air conditioner operates in a refrigeration mode, the set refrigerant flow direction is that high-temperature refrigerant discharged by the compressor firstly flows through the outdoor heat exchanger to exchange heat with the outdoor environment, then flows into the indoor heat exchanger to exchange heat with the indoor environment, and finally the refrigerant flows back to the compressor to be compressed again; in the process, the refrigerant flowing through the outdoor heat exchanger emits heat to the outdoor environment, the refrigerant flowing through the indoor heat exchanger absorbs heat from the indoor environment, and the indoor heat can be continuously discharged to the outdoor environment through the circulating flow of the refrigerant in the refrigerant circulating loop, so that the refrigeration purpose of reducing the temperature of the indoor environment can be achieved.
The set refrigerant flow direction during the heating mode refers to that the high-temperature refrigerant discharged by the compressor firstly flows through the indoor heat exchanger to exchange heat with the outdoor environment, then flows into the outdoor heat exchanger to exchange heat with the indoor environment, and finally flows back to the compressor to be compressed again; in the process, the refrigerant flowing through the indoor heat exchanger emits heat to the indoor environment, the refrigerant flowing through the outdoor heat exchanger absorbs heat from the outdoor environment, and the outdoor heat can be continuously released to the indoor environment through the circulating flow of the refrigerant in the refrigerant circulating loop, so that the heating purpose of improving the temperature of the indoor environment can be achieved.
Generally, since the indoor heat exchanger is a heat exchanger directly used for changing an indoor temperature environment, the degree of cleanliness of the indoor heat exchanger may directly affect the use experience of a user. Therefore, the main application of the self-cleaning mode of the air conditioner of the present invention is an indoor heat exchanger. Of course, the self-cleaning mode of the air conditioner of the present invention may also be used to clean the outdoor heat exchanger, so in a specific embodiment, when the air conditioner of the present invention performs a cleaning process, only one of the indoor heat exchanger and the outdoor heat exchanger may be cleaned, or both of the indoor heat exchanger and the outdoor heat exchanger may be cleaned. It should be understood that if the existing air conditioner uses the same or similar control method as the present invention to perform the self-cleaning operation of the indoor and outdoor heat exchangers, it should be also included in the protection scope of the present invention.
Taking the self-cleaning process of the indoor heat exchanger as an example, the working process of the air conditioner in the self-cleaning operation mode mainly comprises two stages which are sequentially carried out: the defrosting stage of the indoor heat exchanger and the defrosting stage of the indoor heat exchanger. In the defrosting stage of the indoor heat exchanger, ice can be condensed and frosted on the indoor heat exchanger of the indoor unit; in the defrosting stage of the indoor heat exchanger, the condensed frost of the indoor heat exchanger in the previous defrosting stage is melted, impurities such as dust and the like can be separated from the indoor heat exchanger along with the melted condensed water, and the cleaning treatment of the indoor heat exchanger is completed.
Specifically, in the operation process of the air conditioner in the refrigeration mode, if the power of the compressor is improved and the output quantity of the refrigerant is increased, the low-temperature refrigerant quantity input into the indoor unit can be increased, the redundant refrigerant cold quantity can reduce the internal temperature of the indoor unit, and when the internal temperature of the indoor unit is lower than the frost condensation critical temperature value (such as 0 ℃), water vapor in air flowing through the indoor unit can be gradually condensed into frost in the indoor unit.
In the heating mode operation process of the air conditioner, the high-temperature refrigerant firstly flows through the indoor heat exchanger, so that the cold energy of the high-temperature refrigerant can increase the internal temperature of the indoor unit, and when the internal temperature of the indoor unit is higher than the frost condensation critical temperature value (such as 0 ℃), the frost condensed in the indoor unit can be gradually melted and dripped, so that the frost can be separated from the indoor heat exchanger. The control method of the invention is that under the condition that the flow direction of the refrigerant limited by the heating mode of the air conditioner is controlled at the defrosting stage of the indoor heat exchanger, the defrosting operation of the indoor heat exchanger is realized by adjusting the operation parameters of components such as a compressor, a fan, a throttling device and the like.
Similarly, when the outdoor heat exchanger is self-cleaned, when the air conditioner flows in the refrigerant flow direction defined by the heating mode, the refrigerant flowing out of the indoor heat exchanger is a medium-temperature refrigerant and the refrigerant flowing into the outdoor heat exchanger after being throttled by the throttling device is a low-temperature refrigerant, so that the low-temperature refrigerant can reduce the temperature of the outdoor heat exchanger, and when the temperature inside the outdoor unit is lower than the frost condensation critical temperature value (such as 0 ℃), water vapor in the air flowing through the outdoor unit can be gradually condensed into frost inside the outdoor unit. Therefore, the ice and the frost of the outdoor heat exchanger are realized while the ice and the frost of the indoor heat exchanger are melted.
And then, the indoor heat exchanger finishes melting ice and defrosting in the defrosting stage of the indoor heat exchanger, self-cleaning of the indoor heat exchanger is finished, the air conditioner enters the defrosting stage of the outdoor heat exchanger, at the moment, the air conditioner is controlled to flow in the direction of the refrigerant flow defined by the refrigeration mode again, the flow direction of the high-temperature refrigerant discharged by the compressor is changed, and the high-temperature refrigerant flows through the outdoor heat exchanger, so that the ice and defrosting of the outdoor heat exchanger can be realized by utilizing the heat of the high-temperature refrigerant, and the self-cleaning process of the outdoor heat exchanger is finished.
In the self-cleaning process, each stage can be performed according to a preset time length, for example, the defrosting stage of the indoor heat exchanger can be preset to 10min, and the defrosting stage of the indoor heat exchanger can be preset to 12min, so that the air conditioner can start timing after the air conditioner enters the defrosting stage of the indoor heat exchanger in the self-cleaning mode, when the time reaches 10min, the air conditioner enters the defrosting stage of the indoor heat exchanger, the defrosting stage of the indoor heat exchanger lasts for 12min, it can be determined that the self-cleaning of the indoor unit is finished, and the air conditioner exits the self-cleaning mode.
In the process that the air conditioner is switched to the flow direction limited by the cooling mode or the heating mode, the opening/closing and the rotating speed of the fans of the indoor unit and the outdoor unit also need to be correspondingly controlled, for example, the indoor fan in the frost condensation stage of the indoor heat exchanger is generally closed or operated at a low speed, and the outdoor fan is opened for operation; and in the defrosting stage of the indoor heat exchanger, the indoor fan is started to operate, and outdoor air is closed or operated at a low speed. Therefore, the indoor unit and the outdoor unit are respectively timed in the self-cleaning process, and when the preset time is reached, the components such as a fan of the air conditioner and the like are controlled to carry out corresponding state switching.
In the self-cleaning process of the air conditioner, the fan in the frost condensation stage generally stops operating or operates at a set wind speed, and after a large amount of user use data is collected, the actual frost condensation effect of the fan setting mode in the self-cleaning mode is found to be poor, so that the cleaning effect of the self-cleaning mode of the air conditioner is influenced.
Therefore, aiming at the possible problems, the invention provides an air conditioner and a self-cleaning control method thereof, aiming at solving the problem of poor self-cleaning effect caused by the fact that a fan is stopped or is controlled by a fixed rotating speed.
Fig. 1 is a first flowchart illustrating a control method for self-cleaning of an air conditioner according to an exemplary embodiment of the present invention.
As shown in fig. 1, the present invention provides a control method for self-cleaning of an air conditioner, which mainly comprises the following steps:
s101, acquiring the temperature of a coil pipe in a frost condensation stage of a self-cleaning mode of air conditioner operation;
in this embodiment, an indoor unit is mainly used as a cleaning object for example, and a clean heat exchanger in the self-cleaning mode is an indoor heat exchanger, so that a frost condensation stage and a frost removal stage in the self-cleaning process are changes of a water vapor state on the indoor heat exchanger.
In this embodiment, the air conditioner is further provided with an independent temperature sensor, and the temperature sensor is arranged close to the coil of the indoor heat exchanger and can be used for detecting the real-time temperature of the coil of the indoor unit of the air conditioner; the coil temperature obtained in step S101 is the temperature of the coil of the indoor unit detected by the temperature sensor when the self-cleaning process is in the frost condensation stage.
Optionally, the control method of the present application is mainly for achieving a promoting effect of the fan rotation speed adjustment in the frost condensation stage on the frost condensation effect; in the final stage of the self-cleaning mode, because the temperature of the indoor heat exchanger is already in a lower temperature state and passes through the frost condensation process in the previous period of the frost condensation stage, the influence of the adjustment of the rotating speed of the fan on the frost condensation effect in the final stage of the frost condensation stage is small, and the adjustment mainly influences the frost condensation effect in the frost condensation process in the previous period of the frost condensation stage; the coil temperature acquired in step S101 may be a coil temperature parameter in a previous period of time except for the last period of the frost formation; for example, the time point of the temperature sensor detecting the coil temperature may be a time point within a previous time period of the frost formation stage, for example, the set time period of the indoor heat exchanger frost formation stage is 10min, then the temperature acquired in step S101 is the temperature data of the temperature sensor within 1-7min, and the 7-10min is the last stage of the previous frost formation stage, so that the temperature detection is not performed during the time period.
Optionally, the time range of the frost formation stage at which the time point of detecting the indoor environment temperature by the temperature sensor is located may be determined according to the initial coil temperature before the air conditioner executes the self-cleaning mode; for example, a correlation between a time range and an initial coil temperature is preset, in the correlation, the time range and the initial coil temperature are in positive correlation, that is, the higher the initial coil temperature is, the larger the proportion of the time range to the total duration of the frost condensation stage is; the lower the initial coil temperature, the smaller the proportion of this time frame to the total duration of the frost phase. Illustratively, when the initial coil temperature is in the temperature range of 15 to 18 ℃, the proportion of the total time length of the defrosting stage of the time range station is 70%, that is, under the condition that the set time length of the defrosting stage is 10min, the detection time point corresponding to the temperature range of 15 to 18 ℃ of the initial coil temperature is 1-7 min; when the initial coil temperature is in the temperature range of 11-13 ℃, the proportion of the time range to the total duration of the frost phase is 40%, namely under the condition that the set duration of the frost phase is 10min, the detection time point corresponding to the temperature range of 11-13 ℃ of the initial coil temperature is 1-4 min. Therefore, under the condition that the temperature of the initial coil is higher, the temperature difference between the frost critical temperature and the initial coil temperature is larger, the time for the indoor heat exchanger to be reduced from the initial coil temperature to the frost critical temperature or even lower temperature is longer, and the influence of the rotating speed adjustment of the fan in the temperature reduction process is obvious, so that the time of the corresponding temperature detection time range is longer; and under the condition that the initial coil temperature is lower, because the temperature difference between the frost critical temperature and the initial coil temperature is smaller, the time for the indoor heat exchanger to be reduced from the initial coil temperature to the frost critical temperature or even lower is shorter, so that the time of the corresponding temperature detection time range is shorter for ensuring the accuracy of the influence of the fan adjustment on the temperature.
S102, adjusting the rotating speed of the fan based on the temperature comparison result of the coil pipe temperature and the frost critical temperature.
The control method for self-cleaning of the air conditioner provided by the invention can adjust the rotating speed of the fan in the frost condensation stage based on the temperature comparison result of the coil pipe temperature and the frost condensation critical temperature, is different from the existing running mode that the fan is stopped or the rotating speed is fixed, and the rotating speed of the fan which is dynamically adjusted can be more matched with the temperature change in the air conditioner, so that the frost condensation rate in the frost condensation stage is accelerated by utilizing the changed rotating speed, the actual frost condensation amount is improved, and the actual cleaning effect of the self-cleaning mode is ensured.
In the embodiment, the fan is provided with at least two wind gears with sequentially increased rotating speeds; here, the wind shield is a wind speed range preset by the air conditioner for the inner fan; for example, the inner fan has a low wind level and a breeze level, and the wind speed of the low wind level is greater than that of the breeze level.
In this way, in step S102, the rotation speed of the fan is adjusted based on the temperature comparison result between the coil temperature and the frost-condensation critical temperature, and the method includes: and when the temperature of the coil pipe is higher than the frost-condensation critical temperature, controlling the fan to operate at a set low wind gear.
For example, the temperature of the inner coil is Toil, the frost critical temperature is Te, and the fan has a set low wind level under the condition that Toil is greater than Te; at this moment, because interior coil pipe temperature is higher than the critical temperature of frost, although the steam in the air can not condense into frost, but begin to be converted into liquid by the gaseous state, the fan can accelerate the inside air flow of indoor set with the operation of low wind-break, and the dew that makes the frost in the indoor set can evenly distributed, guarantees that the frost volume of follow-up frost in-process is even, reduces the appearance of local frost layer too thin, the frost is not enough scheduling problem.
Optionally, in step S102, the rotation speed of the fan is adjusted based on the temperature comparison result between the coil temperature and the frost-condensation critical temperature, and the method further includes: and when the temperature of the coil pipe is less than the frost critical temperature and the temperature difference value between the frost critical temperature and the temperature of the coil pipe is less than a preset temperature difference threshold value, controlling the fan to reduce the rotating speed value corresponding to the low wind gear to a target rotating speed value.
For example, when the Toil < Te and Te-Toil < Deltat are in the condition, the fan is reduced to the target rotating speed value from the set low wind gear; at the moment, because the temperature of the inner coil is lower than the frost condensation critical temperature, but the difference between the two is not large, water vapor in the air is gradually condensed into frost at a slower condensation speed, the fan operates at a target rotating speed value lower than the low wind gear to reduce the adverse effect of too fast air flow on frost condensation, and the water vapor in the air or condensed condensate water can be ensured to have enough condensation time to be converted into solid frost from a gas state or a liquid state at the position where the air is currently in contact with an indoor unit component (such as an indoor heat exchanger).
Optionally, the target rotation speed value may be a rotation speed value corresponding to a breeze gear; alternatively, the target rotation speed value may be a rotation speed value between a low wind gear and a breeze gear.
Optionally, in step S102, the rotation speed of the fan is adjusted based on the temperature comparison result between the coil temperature and the frost-condensation critical temperature, and the method further includes: and when the temperature difference value between the frost critical temperature and the temperature of the coil pipe is greater than a preset temperature difference threshold value, controlling the fan to operate at a set low wind gear.
For example, when the position is Te-Toil >. DELTA.t, the fan is lowered again at the set low wind gear; at the moment, because the temperature of the inner coil pipe is lower than the critical temperature of frost condensation and the difference between the two is large, the water vapor and the condensed water in the air are fully condensed in the indoor unit; considering that the cold energy in the indoor unit comes from the indoor heat exchanger, in order to enable the water vapor on the part of the indoor unit which is slightly far away from the indoor heat exchanger to be firmly condensed, the fan uses a low wind shield to accelerate the transmission of the cold energy of the indoor heat exchanger in the air conditioner, so that the temperatures of most parts of the indoor unit are close, and the frosting effects of all parts are consistent.
Optionally, the control method of the present invention further includes: acquiring the current indoor temperature of a frosting stage of an air conditioner operation self-cleaning mode; determining a preset temperature difference threshold value based on the current indoor temperature and a preset rule; the preset rule is used for representing the corresponding relation between the current indoor temperature and the temperature difference threshold value.
For example, the preset rule is a corresponding relationship between the current indoor temperature and the temperature difference threshold, and in the corresponding relationship, the current indoor temperature and the temperature difference threshold are in positive correlation; under the condition that the current indoor temperature is higher, because the heat exchange with the indoor environment still exists in the self-cleaning process of the air conditioner, and the heat in the indoor environment enters the indoor unit, the temperature range of the indoor unit for frost condensation at a lower condensation speed needs to be increased, the flowing time of the air flow driven by the indoor unit at a target rotating speed value can be further prolonged, the adverse effect of delaying frost formation caused by the heat exchange between the indoor unit and the indoor environment is reduced, and therefore the temperature difference threshold value can be set to be a larger value; on the contrary, under the condition that the current indoor temperature is smaller, the temperature difference threshold value is set to be a smaller value so as to accelerate the whole process of the frost condensation stage.
After the defrosting stage of the air conditioner self-cleaning mode is completed, the air conditioner self-cleaning mode can be switched to the defrosting stage to continue; the control flow of the defrosting stage of the present invention is referred to the description in the foregoing, and is not repeated herein.
Fig. 2 is a second flowchart illustrating a self-cleaning 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 control method for self-cleaning of an air conditioner, which mainly comprises the following steps:
s201, acquiring the temperature of a coil pipe in a frost condensation stage of an air conditioner operation self-cleaning mode;
in this embodiment, the specific execution flow of step S201 may refer to step S101 in the foregoing, which is not described herein again.
S202, adjusting the rotating speed of the fan based on the temperature comparison result of the coil pipe temperature and the frost critical temperature; wherein the rate of adjustment of the rotational speed is determined based on the temperature comparison.
The control method for self-cleaning of the air conditioner provided by the invention can adjust the rotating speed of the fan in the frost condensation stage based on the temperature comparison result of the coil pipe temperature and the frost condensation critical temperature, is different from the existing running mode that the fan is stopped or the rotating speed is fixed, and the rotating speed of the fan which is dynamically adjusted can be more matched with the temperature change in the air conditioner, so that the frost condensation rate in the frost condensation stage is accelerated by utilizing the changed rotating speed, the actual frost condensation amount is improved, and the actual cleaning effect of the self-cleaning mode is ensured.
In the embodiment, the fan is provided with at least two wind gears with sequentially increased rotating speeds; here, the wind shield is a wind speed range preset by the air conditioner for the inner fan; for example, the inner fan has a low wind level and a breeze level, and the wind speed of the low wind level is greater than that of the breeze level.
In this way, in step S202, based on the result of comparing the coil temperature with the frost critical temperature, the rotation speed of the fan is adjusted, including: and when the temperature of the coil pipe is higher than the frost-condensation critical temperature, controlling the fan to operate at a set low wind gear.
For example, the temperature of the inner coil is Toil, the frost critical temperature is Te, and the fan has a set low wind level under the condition that Toil is greater than Te; at this moment, because interior coil pipe temperature is higher than the critical temperature of frost, although the steam in the air can not condense into frost, but begin to be converted into liquid by the gaseous state, the fan can accelerate the inside air flow of indoor set with the operation of low wind-break, and the dew that makes the frost in the indoor set can evenly distributed, guarantees that the frost volume of follow-up frost in-process is even, reduces the appearance of local frost layer too thin, the frost is not enough scheduling problem.
Optionally, in step S202, based on the result of comparing the coil temperature with the frost critical temperature, the method adjusts the rotation speed of the fan, and further includes: when the temperature of the coil pipe is lower than the frost critical temperature and the temperature difference value between the frost critical temperature and the temperature of the coil pipe is lower than a preset temperature difference threshold value, controlling the fan to reduce the rotating speed value corresponding to the low wind gear to a first target rotating speed value;
for example, when the Toil < Te and Te-Toil < Deltat are in the condition, the fan is reduced to a first target rotating speed value from a set low wind gear; at the moment, because the temperature of the inner coil is lower than the frost condensation critical temperature, but the difference value between the two is not large, water vapor in the air is gradually condensed into frost at a slower condensation speed, the fan operates at a first target rotating speed value lower than a low wind gear to reduce the adverse effect of too fast air flow on frost condensation, and the water vapor in the air or condensed condensate water can be ensured to have enough condensation time to be converted into solid frost from a gas state or a liquid state at the position where the air is currently in contact with an indoor unit component (such as an indoor heat exchanger).
Optionally, the first target rotation speed value may be a rotation speed value corresponding to a breeze gear; alternatively, the target rotation speed value may be a rotation speed value between a low wind gear and a breeze gear.
Here, the fan is reduced from a rotational speed value corresponding to a low wind gear to a first target rotational speed value at a first regulation rate. Namely, when the temperature comparison result is that Toil is less than Te and Te-Toil is less than deltat, the adjusting speed of the fan is the first adjusting speed; optionally, the first adjustment rate is 20 rpm, that is, the fan is reduced from the rotation speed value corresponding to the low wind gear to the first target rotation speed value at a rate of 20 rpm.
Here, the low wind gear and the first target rotating speed value are switched at the first adjusting speed, so that the stability of rotating speed switching can be improved, and the stable operation of the fan is ensured; meanwhile, the stable switching of the rotating speed can also enable airflow in the indoor unit to flow stably, and the problems of turbulence and the like caused by the switching of the wind speed are reduced.
Optionally, in step S202, based on the result of comparing the coil temperature with the frost critical temperature, the method adjusts the rotation speed of the fan, and further includes: and when the temperature difference value between the frost critical temperature and the coil pipe temperature is greater than a preset temperature difference threshold value, controlling the fan to reduce the rotating speed value corresponding to the low wind gear to a second target rotating speed value.
For example, when Te-Toil >. DELTA.t is present, the fan is lowered from the set low wind speed to a second target speed value; at the moment, because the temperature of the inner coil pipe is lower than the frost condensation critical temperature, and the difference value between the inner coil pipe and the frost condensation critical temperature is large, water vapor in the air is gradually condensed into frost at a fast condensation speed, the running power consumption of the fan can be reduced by running the fan at a second target rotating speed value lower than the low wind gear, the further condensation of the frost is realized by utilizing the transfer of heat among all solid parts of the indoor unit, and the frost condensation effect is ensured.
Here, the second target rotation speed value is smaller than the first target rotation speed value; when the first target rotation speed value is a wind speed value between a low wind gear and a breeze gear, the second target rotation speed value can be a rotation speed value corresponding to the breeze gear; alternatively, the target rotation speed value may be a rotation speed value between a low wind gear and a breeze gear. And when the first target rotating speed value is the rotating speed value corresponding to the breeze gear, the second target rotating speed value is a rotating speed value lower than the rotating speed value corresponding to the breeze gear.
If the comparison result that the temperature difference value between the frost critical temperature and the coil temperature is greater than the preset temperature difference threshold value is obtained, the fan is at the first target rotation speed value, step S202 in this embodiment is to control the fan to decrease from the first target rotation speed value to the second target rotation speed value.
Here, the fan is reduced from the rotational speed value corresponding to the low wind gear to the first target rotational speed value at the second regulation rate. That is, when the temperature comparison result is Te-Toil >. DELTA.t, the adjusting speed of the fan is the second adjusting speed; the first regulation rate is greater than the second regulation rate, and optionally, the second regulation rate is 20 revolutions per minute, that is, the fan is reduced from the rotation speed value corresponding to the low wind gear to the second target rotation speed value at the rate of 20 revolutions per minute.
Here, the low wind gear and the second target rotating speed value are switched at the second adjusting speed, so that the stability of rotating speed switching can be improved, and the stable operation of the fan is ensured; meanwhile, the stable switching of the rotating speed can also enable airflow in the indoor unit to flow stably, and the problems of turbulence and the like caused by the switching of the wind speed are reduced.
Optionally, the control method of the present invention further includes: acquiring the current indoor temperature of a frosting stage of an air conditioner operation self-cleaning mode; determining a preset temperature difference threshold value based on the current indoor temperature and a preset rule; the preset rule is used for representing the corresponding relation between the current indoor temperature and the temperature difference threshold value.
For example, the preset rule is a corresponding relationship between the current indoor temperature and the temperature difference threshold, and in the corresponding relationship, the current indoor temperature and the temperature difference threshold are in positive correlation; under the condition that the current indoor temperature is higher, because the heat exchange with the indoor environment still exists in the self-cleaning process of the air conditioner, and the heat in the indoor environment enters the indoor unit, the temperature range of the indoor unit for frost condensation at a lower condensation speed needs to be increased, the flowing time of the air flow driven by the indoor unit at a target rotating speed value can be further prolonged, the adverse effect of delaying frost formation caused by the heat exchange between the indoor unit and the indoor environment is reduced, and therefore the temperature difference threshold value can be set to be a larger value; on the contrary, under the condition that the current indoor temperature is smaller, the temperature difference threshold value is set to be a smaller value so as to accelerate the whole process of the frost condensation stage.
After the defrosting stage of the air conditioner self-cleaning mode is completed, the air conditioner self-cleaning mode can be switched to the defrosting stage to continue; the control flow of the defrosting stage of the present invention is referred to the description in the foregoing, and is not repeated herein.
Fig. 3 is a third flowchart illustrating a control method for self-cleaning of an air conditioner according to another exemplary embodiment of the present invention.
As shown in fig. 3, the present invention provides another control method for self-cleaning of an air conditioner, which mainly comprises the following steps:
s301, acquiring the temperature of a coil pipe in a frost condensation stage of a self-cleaning mode of air conditioner operation;
in this embodiment, the specific execution flow of step S301 may refer to step S101 in the foregoing, which is not described herein again.
S302, adjusting the rotating speed of the fan based on the temperature comparison result of the coil temperature and the frost critical temperature, and determining the compensation amount of the rotating speed according to the variation of the coil temperature.
The control method for self-cleaning of the air conditioner provided by the invention can adjust the rotating speed of the fan in the frost-condensation stage based on the temperature comparison result of the coil temperature and the frost-condensation critical temperature, and compensate the rotating speed of the fan according to the change condition of the coil temperature.
In the embodiment, the fan is provided with at least two wind gears with sequentially increased rotating speeds; here, the wind shield is a wind speed range preset by the air conditioner for the inner fan; for example, the inner fan has a low wind level and a breeze level, and the wind speed of the low wind level is greater than that of the breeze level.
Thus, in step S302, the adjusting the rotation speed of the fan based on the temperature comparison result between the coil temperature and the frost-condensation critical temperature includes: and when the temperature of the coil pipe is higher than the frost-condensation critical temperature, controlling the fan to operate at a set low wind gear.
For example, the temperature of the inner coil is Toil, the frost critical temperature is Te, and the fan has a set low wind level under the condition that Toil is greater than Te; at this moment, because interior coil pipe temperature is higher than the critical temperature of frost, although the steam in the air can not condense into frost, but begin to be converted into liquid by the gaseous state, the fan can accelerate the inside air flow of indoor set with the operation of low wind-break, and the dew that makes the frost in the indoor set can evenly distributed, guarantees that the frost volume of follow-up frost in-process is even, reduces the appearance of local frost layer too thin, the frost is not enough scheduling problem.
Optionally, in step S302, the rotation speed of the fan is adjusted based on the temperature comparison result between the coil temperature and the frost-condensation critical temperature, and the method further includes: when the temperature of the coil pipe is lower than the frost critical temperature and the temperature difference value between the frost critical temperature and the temperature of the coil pipe is lower than a preset temperature difference threshold value, controlling the fan to reduce the rotating speed value corresponding to the low wind gear to a first target rotating speed value;
for example, when the Toil < Te and Te-Toil < Deltat are in the condition, the fan is reduced to a first target rotating speed value from a set low wind gear; at the moment, because the temperature of the inner coil is lower than the frost condensation critical temperature, but the difference value between the two is not large, water vapor in the air is gradually condensed into frost at a slower condensation speed, the fan operates at a first target rotating speed value lower than a low wind gear to reduce the adverse effect of too fast air flow on frost condensation, and the water vapor in the air or condensed condensate water can be ensured to have enough condensation time to be converted into solid frost from a gas state or a liquid state at the position where the air is currently in contact with an indoor unit component (such as an indoor heat exchanger).
Optionally, the first target rotation speed value may be a rotation speed value corresponding to a breeze gear; alternatively, the target rotation speed value may be a rotation speed value between a low wind gear and a breeze gear.
Here, when Toil < Te and Te-Toil < Deltat are present, a first compensation amount for the fan rotational speed is determined based on the amount of change in the coil temperature.
Specifically, the air conditioner is preset with a corresponding relation between the variation of the coil temperature and the compensation amount of the fan rotation speed, and illustratively, when the coil temperature decreases by a ℃, the compensation amount corresponding to the rotation speed that decreases by a ℃ is R1; for example, the rotational speed is compensated by-20 revolutions for each 0.5 ℃ decrease in coil temperature.
In the embodiment, the compensation of the fan rotating speed takes a first target rotating speed value as a reference rotating speed, and the coil temperature takes the coil temperature which is judged to meet the conditions that the Toil is less than Te and the Te-Toil is less than delta t for the first time as the reference temperature; for example, when the first determination is that Toil < Te and Te-Toil < Deltat are satisfied, the coil temperature is-3 ℃, and the first target rotating speed value is 200 r/min; and repeatedly detecting the coil temperature for a plurality of times, and when the coil temperature detected for one time is-5 ℃, further calculating and determining that the compensation quantity of the rotating speed is-20 x 4-80, and adjusting the rotating speed of the fan from 200r/min to 120 r/min.
The compensation adjustment of the fan rotating speed can enable the rotating speed of the fan to be more adaptive to the current frosting condition, and is beneficial to accelerating the condensation speed of frost on the indoor unit.
Optionally, in step S302, the rotation speed of the fan is adjusted based on the temperature comparison result between the coil temperature and the frost-condensation critical temperature, and the method further includes: and when the temperature difference value between the frost critical temperature and the coil pipe temperature is greater than a preset temperature difference threshold value, controlling the fan to reduce the rotating speed value corresponding to the low wind gear to a second target rotating speed value.
For example, when Te-Toil >. DELTA.t is present, the fan is lowered from the set low wind speed to a second target speed value; at the moment, because the temperature of the inner coil pipe is lower than the frost condensation critical temperature, and the difference value between the inner coil pipe and the frost condensation critical temperature is large, water vapor in the air is gradually condensed into frost at a fast condensation speed, the running power consumption of the fan can be reduced by running the fan at a second target rotating speed value lower than the low wind gear, the further condensation of the frost is realized by utilizing the transfer of heat among all solid parts of the indoor unit, and the frost condensation effect is ensured.
Here, the second target rotation speed value is smaller than the first target rotation speed value; when the first target rotation speed value is a wind speed value between a low wind gear and a breeze gear, the second target rotation speed value can be a rotation speed value corresponding to the breeze gear; alternatively, the target rotation speed value may be a rotation speed value between a low wind gear and a breeze gear. And when the first target rotating speed value is the rotating speed value corresponding to the breeze gear, the second target rotating speed value is a rotating speed value lower than the rotating speed value corresponding to the breeze gear.
If the comparison result that the temperature difference value between the frost critical temperature and the coil temperature is greater than the preset temperature difference threshold is obtained, the fan is at the first target rotation speed value, step S302 in this embodiment is to control the fan to decrease from the first target rotation speed value to the second target rotation speed value.
Here, in the case of Te-Toil >. DELTA.t, a second compensation amount for the fan rotational speed is also determined in accordance with the amount of change in the coil temperature.
Specifically, the air conditioner is preset with a corresponding relation between the variation of the coil temperature and the compensation amount of the fan rotation speed, and illustratively, when the coil temperature decreases by B ℃, the compensation amount corresponding to the rotation speed that decreases by B ℃ is R2; for example, the rotational speed is compensated by-10 revolutions for each 0.5 ℃ decrease in coil temperature.
In this embodiment, the compensation of the fan speed is based on the second target speed, and the coil temperature is based on the coil temperature determined to satisfy Te-Toil > - Δ t for the first time; for example, when the first determination is that Te-Toil >. DELTA.t is satisfied, the coil temperature is-8 ℃ and the second target rotational speed value is 150 r/min; and repeatedly detecting the coil temperature for a plurality of times, and when the coil temperature detected for one time is-9.5 ℃, further calculating and determining that the compensation quantity of the rotating speed is-20 x 3-60, and adjusting the rotating speed of the fan from 150r/min to 90 r/min.
Here, the second compensation amount of the rotation speed is associated with the variation amount of the coil temperature; the second target rotating speed value is smaller than the first target rotating speed value, and the second compensation amount is smaller than the first compensation amount.
Optionally, the control method of the present invention further includes: acquiring the current indoor temperature of a frosting stage of an air conditioner operation self-cleaning mode; determining a preset temperature difference threshold value based on the current indoor temperature and a preset rule; the preset rule is used for representing the corresponding relation between the current indoor temperature and the temperature difference threshold value.
For example, the preset rule is a corresponding relationship between the current indoor temperature and the temperature difference threshold, and in the corresponding relationship, the current indoor temperature and the temperature difference threshold are in positive correlation; under the condition that the current indoor temperature is higher, because the heat exchange with the indoor environment still exists in the self-cleaning process of the air conditioner, and the heat in the indoor environment enters the indoor unit, the temperature range of the indoor unit for frost condensation at a lower condensation speed needs to be increased, the flowing time of the air flow driven by the indoor unit at a target rotating speed value can be further prolonged, the adverse effect of delaying frost formation caused by the heat exchange between the indoor unit and the indoor environment is reduced, and therefore the temperature difference threshold value can be set to be a larger value; on the contrary, under the condition that the current indoor temperature is smaller, the temperature difference threshold value is set to be a smaller value so as to accelerate the whole process of the frost condensation stage.
After the defrosting stage of the air conditioner self-cleaning mode is completed, the air conditioner self-cleaning mode can be switched to the defrosting stage to continue; the control flow of the defrosting stage of the present invention is referred to the description in the foregoing, and is not repeated herein.
Fig. 4 is a fourth flowchart illustrating a control method of self-cleaning of an air conditioner according to another exemplary embodiment of the present invention.
As shown in fig. 4, the present invention provides another control method for self-cleaning of an air conditioner, which mainly comprises the following steps:
s401, acquiring the temperature of a coil pipe in a frost condensation stage of a self-cleaning mode of air conditioner operation;
in this embodiment, the specific execution flow of step S401 may refer to step S101 in the foregoing, and is not described herein again.
S402, adjusting the rotating speed of the fan based on the temperature comparison result of the coil temperature and the frost critical temperature and the variation of the coil temperature; and the compensation amount of the rotating speed is determined according to the variation of the temperature of the coil.
The control method for self-cleaning of the air conditioner provided by the invention can adjust the rotating speed of the fan in the frost condensation stage based on the temperature comparison result of the coil temperature and the frost condensation critical temperature and the variation of the coil temperature, is different from the existing running mode that the fan is stopped or the rotating speed is fixed, and the rotating speed of the fan which is dynamically adjusted can be more matched with the temperature variation in the air conditioner, so that the frost condensation rate in the frost condensation stage is accelerated by utilizing the varied rotating speed, the actual frost condensation amount is improved, and the actual cleaning effect of the self-cleaning mode is ensured.
In the embodiment, the fan is provided with at least two wind gears with sequentially increased rotating speeds; here, the wind shield is a wind speed range preset by the air conditioner for the inner fan; for example, the inner fan has a low wind level and a breeze level, and the wind speed of the low wind level is greater than that of the breeze level.
Here, the adjusting the rotation speed of the fan based on the temperature comparison result between the coil temperature and the frost critical temperature and the variation amount of the coil temperature in step S402 includes: and when the temperature of the coil pipe is higher than the frost-condensation critical temperature, controlling the fan to operate at a set low wind gear.
For example, the coil temperature is Toil, the frost critical temperature is Te, and when Toil is greater than Te, the fan is set to have a low wind level; at this moment, because the coil pipe temperature is higher than the critical temperature of frost, although the steam in the air can not condense into frost, but begin to be converted into liquid by the gaseous state, the fan moves with low wind-break and can accelerate the inside air flow of indoor set, and the dew that makes the frost in the indoor set can evenly distributed, guarantees that the frost volume of follow-up frost in-process is even, reduces the appearance of local frost layer too thin, the frost of congealing insufficient scheduling problem.
Optionally, in step S402, the rotation speed of the fan is adjusted based on the temperature comparison result between the coil temperature and the frost-condensation critical temperature and the variation of the coil temperature, and the method further includes: when the temperature of the coil pipe is smaller than the frost condensation critical temperature, the temperature difference value between the frost condensation critical temperature and the temperature of the coil pipe is smaller than a preset temperature difference threshold value, and the variation of the temperature of the coil pipe is smaller than a preset variation threshold value, controlling the fan to reduce the rotating speed value corresponding to the low wind gear to a first target rotating speed value;
for example, in the case of Toil < Te, Te-Toil <. DELTA.t, and Delta Toil (variation of coil temperature) <DeltaT (variation threshold), the fan is lowered to a first target rotation speed value from a set low wind speed; at this moment, because the temperature of the inner coil is lower than the frost critical temperature, but the difference between the two is not large, and the variation of the temperature of the coil is smaller than the preset variation threshold, the water vapor in the air is gradually condensed into the frost at a slower condensation speed, the fan operates at a first target rotating speed value lower than the low wind gear to reduce the adverse effect of the excessively fast airflow flow on the condensation of the frost, and the water vapor in the air or the condensed condensate can be ensured to have enough condensation time at the current contact position with the indoor unit component (such as the indoor heat exchanger) to be converted from the gas state or the liquid state into the solid state frost.
Optionally, the first target rotation speed value may be a rotation speed value corresponding to a breeze gear; alternatively, the target rotation speed value may be a rotation speed value between a low wind gear and a breeze gear.
Here, when Toil < Te, Te-Toil < [ delta ] T, and Toil (coil temperature variation) < [ delta ] T (variation threshold), a first compensation amount for the fan rotational speed is determined based on the coil temperature variation (delta Toil).
Specifically, the air conditioner is preset with a corresponding relation between the variation of the coil temperature and the compensation amount of the fan rotation speed, and illustratively, when the coil temperature decreases by a ℃, the compensation amount corresponding to the rotation speed that decreases by a ℃ is R1; for example, the rotational speed is compensated by-20 revolutions for each 0.5 ℃ decrease in coil temperature.
In the embodiment, the compensation of the fan rotating speed takes a first target rotating speed value as a reference rotating speed, and the coil temperature takes the coil temperature which is judged to meet the conditions that the Toil is less than Te and the Te-Toil is less than delta t for the first time as the reference temperature; for example, when the first determination is that Toil < Te and Te-Toil < Deltat are satisfied, the coil temperature is-3 ℃, and the first target rotating speed value is 200 r/min; and repeatedly detecting the coil temperature for many times, and when the coil temperature detected for one time is-5 ℃, further calculating to obtain that the delta Toil is 2 ℃, the compensation quantity of the rotating speed is-20 x 4-80, and then adjusting the rotating speed of the fan from 200r/min to 120 r/min.
The compensation adjustment of the fan rotating speed can enable the rotating speed of the fan to be more adaptive to the current frosting condition, and is beneficial to accelerating the condensation speed of frost on the indoor unit.
Optionally, in step S402, the rotation speed of the fan is adjusted based on the temperature comparison result between the coil temperature and the frost-condensation critical temperature and the variation of the coil temperature, and the method further includes: when the temperature difference value between the frost critical temperature and the coil pipe temperature is larger than a preset temperature difference threshold value and the variation of the coil pipe temperature is larger than a preset variation threshold value, controlling the fan to reduce the rotating speed value corresponding to the low wind gear to a second target rotating speed value;
for example, when Te-Toil > -Deltat, and Deltatoil (variation of coil temperature) > -DeltaT (variation threshold), the fan is reduced to a second target rotating speed value from a set low wind gear; at this moment, because the inner coil temperature is less than the critical temperature of frost, the difference between the two is great, and the variation of coil temperature is greater than preset variation threshold, then the steam in the air condenses into the frost gradually with the faster speed of condensing, and the fan can reduce its consumption of operation with the second target rotational speed value operation that is less than low wind shelves, utilizes the further condensation of the transmission realization frost of heat between each solid parts of indoor set, guarantees the frost effect.
Here, the second target rotation speed value is smaller than the first target rotation speed value; when the first target rotation speed value is a wind speed value between a low wind gear and a breeze gear, the second target rotation speed value can be a rotation speed value corresponding to the breeze gear; alternatively, the target rotation speed value may be a rotation speed value between a low wind gear and a breeze gear. And when the first target rotating speed value is the rotating speed value corresponding to the breeze gear, the second target rotating speed value is a rotating speed value lower than the rotating speed value corresponding to the breeze gear.
If the comparison result that the temperature difference value between the frost critical temperature and the coil temperature is greater than the preset temperature difference threshold value is obtained, the fan is at the first target rotation speed value, step S402 in this embodiment is to control the fan to decrease from the first target rotation speed value to the second target rotation speed value.
Here, when Te-Toil >. DELTA.t and Te-Toil >. DELTA.T are present, a second compensation amount for the fan rotational speed is determined in accordance with the amount of change in the coil temperature.
Specifically, the air conditioner is preset with a corresponding relation between the variation of the coil temperature and the compensation amount of the fan rotation speed, and illustratively, when the coil temperature decreases by B ℃, the compensation amount corresponding to the rotation speed that decreases by B ℃ is R2; for example, the rotational speed is compensated by-10 revolutions for each 0.5 ℃ decrease in coil temperature.
In this embodiment, the compensation of the fan speed is based on the second target speed, and the coil temperature is based on the coil temperature determined to satisfy Te-Toil > - Δ t for the first time; for example, when the first determination is that Te-Toil >. DELTA.t is satisfied, the coil temperature is-8 ℃ and the second target rotational speed value is 150 r/min; and repeatedly detecting the coil temperature for a plurality of times, and when the coil temperature detected for one time is-9.5 ℃, further calculating and determining that the compensation quantity of the rotating speed is-20 x 3-60, and adjusting the rotating speed of the fan from 150r/min to 90 r/min.
Here, the second compensation amount of the rotation speed is associated with the variation amount of the coil temperature; the second target rotating speed is less than the first target rotating speed, and the second compensation amount is less than the first compensation amount.
Optionally, the control method of the present invention further includes: acquiring the current indoor temperature of a frosting stage of an air conditioner operation self-cleaning mode; determining a preset temperature difference threshold value based on the current indoor temperature and a preset rule; the preset rule is used for representing the corresponding relation between the current indoor temperature and the temperature difference threshold value.
For example, the preset rule is a corresponding relationship between the current indoor temperature and the temperature difference threshold, and in the corresponding relationship, the current indoor temperature and the temperature difference threshold are in positive correlation; under the condition that the current indoor temperature is higher, because the heat exchange with the indoor environment still exists in the self-cleaning process of the air conditioner, and the heat in the indoor environment enters the indoor unit, the temperature range of the indoor unit for frost condensation at a lower condensation speed needs to be increased, the flowing time of the air flow driven by the indoor unit at a target rotating speed value can be further prolonged, the adverse effect of delaying frost formation caused by the heat exchange between the indoor unit and the indoor environment is reduced, and therefore the temperature difference threshold value can be set to be a larger value; on the contrary, under the condition that the current indoor temperature is smaller, the temperature difference threshold value is set to be a smaller value so as to accelerate the whole process of the frost condensation stage.
After the defrosting stage of the air conditioner self-cleaning mode is completed, the air conditioner self-cleaning mode can be switched to the defrosting stage to continue; the control flow of the defrosting stage of the present invention is referred to the description in the foregoing, and is not repeated herein.
Fig. 5 is a flowchart illustrating a control method of self-cleaning of an air conditioner according to another exemplary embodiment of the present invention.
As shown in fig. 5, the present invention provides another control method for self-cleaning of an air conditioner, which mainly comprises the following steps:
s501, obtaining fan current of a frost condensation stage of an air conditioner operation self-cleaning mode;
in the embodiment, an indoor unit is mainly used as a cleaning object for illustration, and a clean heat exchanger in a self-cleaning mode is an indoor heat exchanger, so that a frost condensation stage and a frost removal stage in a self-cleaning process are changes of water vapor states on the indoor heat exchanger; the fan current obtained in step S501 is also an operating current of an inner fan for conveying airflow to the indoor heat exchanger;
in this embodiment, the control process is mainly controlled by components such as a controller, a computer board, and an MCU provided in the air conditioner, and the power supply circuit of the inner fan is electrically connected to these components, so that these components can obtain related operating parameters such as the fan current of the inner fan.
The principle of the invention is that in the process of the air conditioner executing the frost condensation stage of the self-cleaning mode, as the frost is gradually condensed on the indoor heat exchanger and other components, the frost layer can play a certain wind resistance effect, and for the fan for conveying air, when the wind resistance of the indoor unit is increased, the actual running current of the fan is larger than the situation of no wind resistance or small wind resistance in order to maintain the stable rotating speed of the fan. Therefore, the invention can further judge the frost condensation condition in the frost condensation stage in the indoor unit according to the current change of the fan, and further adjust the rotating speed of the fan so as to further promote the frost condensation process by utilizing the adjusted fan.
Optionally, the control method of the present application is mainly for achieving a promoting effect of the fan rotation speed adjustment in the frost condensation stage on the frost condensation effect; in the final stage of the self-cleaning mode, because the temperature of the indoor heat exchanger is already in a lower temperature state and passes through the frost condensation process in the previous period of the frost condensation stage, the influence of the adjustment of the rotating speed of the fan on the frost condensation effect in the final stage of the frost condensation stage is small, and the wind resistance variation is small, which mainly influences the frost condensation effect in the frost condensation process in the previous period of the frost condensation stage; the fan current acquired in step S501 may be a current parameter in a previous period of time except for the last period of the frost formation; for example, the time point of acquiring the fan current may be a time point within a previous time period of the frost formation stage, for example, the set time period of the indoor heat exchanger frost formation stage is 10min, the fan current acquired in step S101 is current data within 1-7min, and 7-10min is the last stage of the previous frost formation stage, so that the current data is not detected and acquired in this time period.
Optionally, the time range of the time point of obtaining the current of the fan in the frost condensation stage may be determined according to the initial coil temperature before the air conditioner executes the self-cleaning mode; for example, a correlation between a time range and an initial coil temperature is preset, in the correlation, the time range and the initial coil temperature are in positive correlation, that is, the higher the initial coil temperature is, the larger the proportion of the time range to the total duration of the frost condensation stage is; the lower the initial coil temperature, the smaller the proportion of this time frame to the total duration of the frost phase. Illustratively, when the initial coil temperature is in a temperature range of 15 to 18 ℃, the proportion of the time range to the total time length of the defrosting stage is 70%, that is, under the condition that the set time length of the defrosting stage is 10min, the detection time point corresponding to the temperature range of 15 to 18 ℃ of the initial coil temperature is 1-7 min; when the initial coil temperature is in the temperature range of 11-13 ℃, the proportion of the time range to the total duration of the frost phase is 40%, namely under the condition that the set duration of the frost phase is 10min, the detection time point corresponding to the temperature range of 11-13 ℃ of the initial coil temperature is 1-4 min. Therefore, under the condition that the initial coil temperature is higher, the temperature difference between the frost critical temperature and the initial coil temperature is larger, the time for the indoor heat exchanger to be reduced from the initial coil temperature to the frost critical temperature or even lower temperature is longer, and the influence of the rotating speed adjustment of the fan on the temperature reduction process is obvious, so that the time range for obtaining the operation by the corresponding fan current detection is longer; and under the condition that the initial coil temperature is lower, because the temperature difference between the frost critical temperature and the initial coil temperature is smaller, the time for the indoor heat exchanger to be reduced from the initial coil temperature to the frost critical temperature or even lower is shorter, so that the time for detecting and acquiring the time range of operation of the corresponding fan current is shorter for ensuring the accuracy of the influence of the fan adjustment on the temperature.
And S502, adjusting the rotating speed of the fan based on the comparison result of the fan current and the fan reference current.
Here, the fan reference current is an operating current of the fan when the indoor unit is not frosted. Optionally, the working current is the working current of the fan after the air conditioner meets the trigger condition of the self-cleaning mode and before the self-cleaning mode is executed.
The control method for self-cleaning of the air conditioner provided by the invention can adjust the rotating speed of the fan in the frost condensation stage based on the comparison result of the fan current and the fan reference current, is different from the existing running mode that the fan is stopped or the rotating speed is fixed, and the rotating speed of the fan which is dynamically adjusted can be more matched with the temperature change in the air conditioner, so that the frost condensation rate in the frost condensation stage is accelerated by utilizing the changed rotating speed, the actual frost condensation amount is improved, and the actual cleaning effect of the self-cleaning mode is ensured.
In the embodiment, the fan is provided with at least two wind gears with sequentially increased rotating speeds; here, the wind shield is a wind speed range preset by the air conditioner for the inner fan; for example, the inner fan has a low wind level and a breeze level, and the wind speed of the low wind level is greater than that of the breeze level.
In this way, in step S502, based on the comparison result between the fan current and the fan reference current, the adjusting of the rotation speed of the fan includes: and when the current of the fan is equal to the reference current of the fan, controlling the fan to operate at a set low wind gear.
For example, if the fan current is I and the fan reference current is Ie, the fan is set to a low wind level if I is equal to Ie; at this moment, because the fan current equals fan reference current, it indicates that there is no wind resistance or the wind resistance is minimum temporarily in the indoor set this moment, and the steam in the air is temporarily not condensed into frost in the indoor set, but begins to be converted into liquid by the gaseous state, and the fan moves with low wind-speed gear and can accelerate the inside air flow of indoor set, makes the dew of frost in the indoor set evenly distributed, guarantees that the frost volume of follow-up frost in-process is even, reduces the appearance of local frost layer is too thin, the frost is not enough scheduling problem.
Optionally, in step S502, based on a comparison result between the fan current and the fan reference current, adjusting the rotation speed of the fan further includes: and when the current of the fan is larger than the reference current of the fan, controlling the fan to reduce the rotating speed value corresponding to the low wind gear to the target rotating speed value.
For example, when I > Ie, the fan is reduced to the target rotating speed value from the set low wind gear; at the moment, because the current of the fan is greater than the reference current of the fan, the condition that the wind speed generated by frost condensation exists in the indoor unit can be judged, the water vapor in the air is gradually condensed into the frost, the fan operates at a target rotating speed value lower than a low wind gear to reduce the adverse effect of too fast air flow on the frost condensation, and the water vapor in the air or condensed condensate water can be ensured to have enough condensation time to be converted into solid frost from a gas state or a liquid state at the current position in contact with the indoor unit component (such as an indoor heat exchanger).
Optionally, the target rotation speed value may be a rotation speed value corresponding to a breeze gear; alternatively, the target rotation speed value may be a rotation speed value between a low wind gear and a breeze gear.
Optionally, in step S502, based on a comparison result between the fan current and the fan reference current, adjusting the rotation speed of the fan further includes: and when the current difference value between the current of the fan and the reference current of the fan is larger than the current difference threshold value, controlling the fan to operate at a set low wind gear.
For example, when the wind turbine is in the condition of I-Ie >. DELTA.i, the wind turbine is lowered again at the set low wind speed; at the moment, because the current of the fan is greater than the reference current of the fan and the difference between the current and the reference current of the fan is large, water vapor and condensed water in the air are fully condensed in the indoor unit; considering that the cold energy in the indoor unit comes from the indoor heat exchanger, in order to enable the water vapor on the part of the indoor unit which is slightly far away from the indoor heat exchanger to be firmly condensed, the fan uses a low wind shield to accelerate the transmission of the cold energy of the indoor heat exchanger in the air conditioner, so that the temperatures of most parts of the indoor unit are close, and the frosting effects of all parts are consistent.
Optionally, the control method of the present invention further includes: acquiring the current indoor temperature of a frosting stage of an air conditioner operation self-cleaning mode; determining a fan reference current based on the current indoor temperature and a preset rule; the preset rule is used for representing the corresponding relation between the current indoor temperature and the fan reference current.
For example, the preset rule is a corresponding relationship between the current indoor temperature and the fan reference current, and in the corresponding relationship, the current indoor temperature and the fan reference current are in a positive correlation; under the condition that the current indoor temperature is higher, because the air conditioner still has heat exchange with the indoor environment in the self-cleaning process, and the heat in the indoor environment enters the indoor unit, the reference current of the fan can be set to be a larger value so as to increase the variation range of the current of the fan, delay the time of entering the condition of I-Ie >. DELTA.i, increase the total time of the indoor unit for carrying out frost condensation at a slower condensation speed, and reduce the adverse effect of delaying frost formation caused by the heat exchange between the indoor unit and the indoor environment; on the contrary, under the condition that the current indoor temperature is smaller, the reference current of the fan is set to be a smaller value so as to accelerate the whole process of the frost condensation stage.
After the defrosting stage of the air conditioner self-cleaning mode is completed, the air conditioner self-cleaning mode can be switched to the defrosting stage to continue; the control flow of the defrosting stage of the present invention is referred to the description in the foregoing, and is not repeated herein.
Fig. 6 is a flowchart illustrating a control method of self-cleaning of an air conditioner according to still another exemplary embodiment of the present invention.
As shown in fig. 6, the present invention provides another control method for self-cleaning of an air conditioner, which mainly comprises the following steps:
s601, acquiring fan current of a frost condensation stage of an air conditioner operation self-cleaning mode;
in this embodiment, the specific implementation manner of step S601 may refer to step S501 in the foregoing, which is not described herein again.
S602, adjusting the rotating speed of the fan based on the comparison result of the fan current and the fan reference current; wherein the rate of adjustment of the rotational speed is determined in response to the rate of change of the fan current.
Here, the fan reference current is an operating current of the fan when the indoor unit is not frosted. Optionally, the working current is the working current of the fan after the air conditioner meets the trigger condition of the self-cleaning mode and before the self-cleaning mode is executed.
The control method for self-cleaning of the air conditioner provided by the invention can adjust the rotating speed of the fan in the frost condensation stage based on the comparison result of the fan current and the fan reference current, is different from the existing running mode that the fan is stopped or the rotating speed is fixed, and the rotating speed of the fan which is dynamically adjusted can be more matched with the temperature change in the air conditioner, so that the frost condensation rate in the frost condensation stage is accelerated by utilizing the changed rotating speed, the actual frost condensation amount is improved, and the actual cleaning effect of the self-cleaning mode is ensured.
In the embodiment, the fan is provided with at least two wind gears with sequentially increased rotating speeds; here, the wind shield is a wind speed range preset by the air conditioner for the inner fan; for example, the inner fan has a low wind level and a breeze level, and the wind speed of the low wind level is greater than that of the breeze level.
In this way, in step S602, based on the comparison result between the fan current and the fan reference current, the adjusting of the rotation speed of the fan includes: and when the current of the fan is equal to the reference current of the fan, controlling the fan to operate at a set low wind gear.
For example, if the fan current is I and the fan reference current is Ie, the fan is set to a low wind level if I is equal to Ie; at this moment, because the fan current equals fan reference current, it indicates that there is no wind resistance or the wind resistance is minimum temporarily in the indoor set this moment, and the steam in the air is temporarily not condensed into frost in the indoor set, but begins to be converted into liquid by the gaseous state, and the fan moves with low wind-speed gear and can accelerate the inside air flow of indoor set, makes the dew of frost in the indoor set evenly distributed, guarantees that the frost volume of follow-up frost in-process is even, reduces the appearance of local frost layer is too thin, the frost is not enough scheduling problem.
Optionally, in step S602, based on a comparison result between the fan current and the fan reference current, adjusting the rotation speed of the fan further includes: when the current of the fan is larger than the reference current of the fan, the fan is controlled to be reduced to a first target rotating speed value from a rotating speed value corresponding to a low wind gear;
for example, when I > Ie, the fan is reduced to a first target rotating speed value from a set low wind gear; at the moment, because the current of the fan is greater than the reference current of the fan, the condition that the wind speed generated by frost condensation exists in the indoor unit can be judged, the water vapor in the air is gradually condensed into the frost, the fan operates at a target rotating speed value lower than a low wind gear to reduce the adverse effect of too fast air flow on the frost condensation, and the water vapor in the air or condensed condensate water can be ensured to have enough condensation time to be converted into solid frost from a gas state or a liquid state at the current position in contact with the indoor unit component (such as an indoor heat exchanger).
Optionally, the first target rotation speed value may be a rotation speed value corresponding to a breeze gear; alternatively, the target rotation speed value may be a rotation speed value between a low wind gear and a breeze gear.
Here, the fan is reduced from a rotational speed value corresponding to a low wind gear to a first target rotational speed value at a first regulation rate. Namely, when the comparison result of the fan current and the fan reference current is I & gt Ie, the adjusting rate of the fan is a first adjusting rate; optionally, the first adjustment rate is associated with a change rate of the fan current, and optionally, when the current change amount per minute of the fan current is a, the first adjustment rate of the fan is R1 rpm, for example, when the current change amount per minute of the fan current is 0.05A, the first adjustment rate of the fan is 20 rpm, that is, the fan is reduced from the rotation speed value corresponding to the low wind gear to the first target rotation speed value at a rate of 20 rpm.
Here, the current change amount per minute of the fan current is a, which can be calculated by dividing the current difference value between I and Ie by the time interval between two consecutive processes when the control process determines for the first time that the comparison result of I > Ie is obtained.
Here, the low wind gear and the first target rotating speed value are switched at the first adjusting speed, so that the stability of rotating speed switching can be improved, and the stable operation of the fan is ensured; meanwhile, the stable switching of the rotating speed can also enable airflow in the indoor unit to flow stably, and the problems of turbulence and the like caused by the switching of the wind speed are reduced.
Optionally, in step S602, based on a comparison result between the fan current and the fan reference current, adjusting the rotation speed of the fan further includes: when the current difference value between the current of the fan and the reference current of the fan is larger than the current difference threshold value, controlling the fan to reduce the rotating speed value corresponding to the low wind gear to a second target rotating speed value;
for example, when the speed is I-Ie >. DELTA.i, the fan is lowered from the set low wind speed to a first target speed value; at the moment, because the current of the fan is greater than the reference current of the fan, and the difference between the current and the reference current of the fan is large and empty, water vapor in the air is gradually condensed into frost at a fast condensing speed, the fan operates at a second target rotating speed value lower than a low wind gear, the operating power consumption of the fan can be reduced, the further condensation of the frost is realized by utilizing the transfer of heat among various solid parts of the indoor unit, and the frost condensing effect is ensured.
Here, the fan is reduced from the rotational speed value corresponding to the low wind gear to the second target rotational speed value at the second regulation rate. That is, when the comparison result of the fan current and the fan reference current is I-Ie >. DELTA I, the adjusting rate of the fan is the second adjusting rate; optionally, the second regulation rate is associated with a change rate of the coil temperature, and optionally, when the change rate of the coil temperature is B, the second regulation rate of the fan is R2 rpm, for example, when the change rate of the coil temperature is 0.5 ℃/min, the second regulation rate of the fan is 10 rpm, that is, the fan is reduced from the rotation speed value corresponding to the low wind gear to the second target rotation speed value at a speed of 10 rpm.
Here, the rate of change B of the coil temperature can be calculated by dividing the time interval by the difference between the coil temperatures detected in the two successive processes when the control process first determines that the comparison result of I-Ie >. DELTA.i is obtained.
Here, the air conditioner indoor unit is further provided with a temperature sensor at a position adjacent to the coil, and the temperature sensor can be used for detecting the temperature of the coil of the indoor heat exchanger.
Here, the second target rotation speed value is smaller than the first target rotation speed value; when the first target rotation speed value is a wind speed value between a low wind gear and a breeze gear, the second target rotation speed value can be a rotation speed value corresponding to the breeze gear; alternatively, the target rotation speed value may be a rotation speed value between a low wind gear and a breeze gear. And when the first target rotating speed value is the rotating speed value corresponding to the breeze gear, the second target rotating speed value is a rotating speed value lower than the rotating speed value corresponding to the breeze gear.
If the comparison result that the temperature difference value between the frost critical temperature and the coil temperature is greater than the preset temperature difference threshold is obtained, the fan is at the first target rotation speed value, step S602 in this embodiment is to control the fan to decrease from the first target rotation speed value to the second target rotation speed value.
Optionally, the control method of the present invention further includes: acquiring the current indoor temperature of a frosting stage of an air conditioner operation self-cleaning mode; determining a fan reference current based on the current indoor temperature and a preset rule; the preset rule is used for representing the corresponding relation between the current indoor temperature and the fan reference current.
For example, the preset rule is a corresponding relationship between the current indoor temperature and the fan reference current, and in the corresponding relationship, the current indoor temperature and the fan reference current are in a positive correlation; under the condition that the current indoor temperature is higher, because the air conditioner still has heat exchange with the indoor environment in the self-cleaning process, and the heat in the indoor environment enters the indoor unit, the reference current of the fan can be set to be a larger value so as to increase the variation range of the current of the fan, delay the time of entering the condition of I-Ie >. DELTA.i, increase the total time of the indoor unit for carrying out frost condensation at a slower condensation speed, and reduce the adverse effect of delaying frost formation caused by the heat exchange between the indoor unit and the indoor environment; on the contrary, under the condition that the current indoor temperature is smaller, the reference current of the fan is set to be a smaller value so as to accelerate the whole process of the frost condensation stage.
After the defrosting stage of the air conditioner self-cleaning mode is completed, the air conditioner self-cleaning mode can be switched to the defrosting stage to continue; the control flow of the defrosting stage of the present invention is referred to the description in the foregoing, and is not repeated herein.
Fig. 7 is a seventh flowchart illustrating a control method of self-cleaning of an air conditioner according to still another exemplary embodiment of the present invention.
As shown in fig. 7, the present invention provides another control method for self-cleaning of an air conditioner, which mainly comprises the following steps:
s701, acquiring the temperature of a coil pipe and the exhaust temperature of a compressor in a frost condensation stage of a self-cleaning mode of air conditioner operation;
in this embodiment, the manner of acquiring the temperature of the coil may refer to the step S101 in the foregoing, which is not described herein again.
Similarly, the air conditioner is also provided with a temperature sensor at the exhaust port or the exhaust pipeline of the compressor, and the temperature sensor can be used for detecting the exhaust temperature of the compressor; in step S701 of the present invention, the discharge temperature data of the compressor is detected by the temperature sensor.
Here, the discharge temperature of the compressor is detected in the same manner as the coil temperature.
S702, adjusting the rotating speed of the fan based on the temperature comparison result of the coil pipe temperature and the frost critical temperature, and determining the compensation amount of the rotating speed according to the variation of the exhaust temperature.
The control method for self-cleaning of the air conditioner provided by the invention can adjust the rotating speed of the fan in the frost condensation stage based on the temperature comparison result of the coil pipe temperature and the frost condensation critical temperature, and compensate the rotating speed of the fan according to the change condition of the exhaust temperature.
In the embodiment, the fan is provided with at least two wind gears with sequentially increased rotating speeds; here, the wind shield is a wind speed range preset by the air conditioner for the inner fan; for example, the inner fan has a low wind level and a breeze level, and the wind speed of the low wind level is greater than that of the breeze level.
Thus, in step S702, the adjusting the rotation speed of the fan based on the comparison result between the coil temperature and the frost-condensation critical temperature includes: and when the temperature of the coil pipe is higher than the frost-condensation critical temperature, controlling the fan to operate at a set low wind gear.
For example, the coil temperature is Toil, the frost critical temperature is Te, and when Toil is greater than Te, the fan is set to have a low wind level; at this moment, because the coil pipe temperature is higher than the critical temperature of frost, although the steam in the air can not condense into frost, but begin to be converted into liquid by the gaseous state, the fan moves with low wind-break and can accelerate the inside air flow of indoor set, and the dew that makes the frost in the indoor set can evenly distributed, guarantees that the frost volume of follow-up frost in-process is even, reduces the appearance of local frost layer too thin, the frost of congealing insufficient scheduling problem.
Optionally, in step S702, the rotation speed of the fan is adjusted based on the temperature comparison result between the coil temperature and the frost-condensation critical temperature, and the method further includes: when the temperature of the coil pipe is lower than the frost critical temperature and the temperature difference value between the frost critical temperature and the temperature of the coil pipe is lower than a preset temperature difference threshold value, controlling the fan to reduce the rotating speed value corresponding to the low wind gear to a first target rotating speed value;
for example, when the Toil < Te and Te-Toil < Deltat are in the condition, the fan is reduced to a first target rotating speed value from a set low wind gear; at the moment, because the temperature of the inner coil is lower than the frost condensation critical temperature, but the difference value between the two is not large, water vapor in the air is gradually condensed into frost at a slower condensation speed, the fan operates at a first target rotating speed value lower than a low wind gear to reduce the adverse effect of too fast air flow on frost condensation, and the water vapor in the air or condensed condensate water can be ensured to have enough condensation time to be converted into solid frost from a gas state or a liquid state at the position where the air is currently in contact with an indoor unit component (such as an indoor heat exchanger).
Optionally, the first target rotation speed value may be a rotation speed value corresponding to a breeze gear; alternatively, the target rotation speed value may be a rotation speed value between a low wind gear and a breeze gear.
Here, when Toil < Te and Te-Toil < Deltat are present, the first compensation amount for the fan rotational speed is also determined based on the amount of change in the exhaust temperature.
Specifically, the air conditioner is preset with a corresponding relation between the variation of the exhaust temperature and the compensation amount of the rotating speed of the fan, and illustratively, when the exhaust temperature decreases by a ℃, the compensation amount corresponding to the rotating speed that decreases by a ℃ is R1; for example, the rotational speed is compensated for-20 revolutions per 0.5 ℃ decrease in exhaust temperature.
In the embodiment, the compensation of the fan rotating speed takes the first target rotating speed value as a reference rotating speed, and the exhaust temperature takes the exhaust temperature when the condition that the Toil < Te and Te-Toil < Deltat are met in the first judgment as the reference temperature; for example, when the first determination is that Toil < Te and Te-Toil < Deltat are satisfied, the exhaust temperature is 65 ℃, and the first target rotating speed value is 200 r/min; the exhaust temperature is repeatedly detected for a plurality of times, when the detected exhaust temperature is 63 ℃, the compensation quantity of the rotation speed can be further calculated and determined to be-20 x 4-80, and the rotation speed of the fan is adjusted to 120r/min from 200 r/min.
The compensation adjustment of the fan rotating speed can enable the rotating speed of the fan to be more adaptive to the current frosting condition, and is beneficial to accelerating the condensation speed of frost on the indoor unit.
Optionally, in step S702, the rotation speed of the fan is adjusted based on the temperature comparison result between the coil temperature and the frost-condensation critical temperature, and the method further includes: and when the temperature difference value between the frost critical temperature and the coil pipe temperature is greater than a preset temperature difference threshold value, controlling the fan to reduce the rotating speed value corresponding to the low wind gear to a second target rotating speed value.
For example, when Te-Toil >. DELTA.t is present, the fan is lowered from the set low wind speed to a second target speed value; at the moment, because the temperature of the inner coil pipe is lower than the frost condensation critical temperature, and the difference value between the inner coil pipe and the frost condensation critical temperature is large, water vapor in the air is gradually condensed into frost at a fast condensation speed, the running power consumption of the fan can be reduced by running the fan at a second target rotating speed value lower than the low wind gear, the further condensation of the frost is realized by utilizing the transfer of heat among all solid parts of the indoor unit, and the frost condensation effect is ensured.
Here, the second target rotation speed value is smaller than the first target rotation speed value; when the first target rotation speed value is a wind speed value between a low wind gear and a breeze gear, the second target rotation speed value can be a rotation speed value corresponding to the breeze gear; alternatively, the target rotation speed value may be a rotation speed value between a low wind gear and a breeze gear. And when the first target rotating speed value is the rotating speed value corresponding to the breeze gear, the second target rotating speed value is a rotating speed value lower than the rotating speed value corresponding to the breeze gear.
If the comparison result that the temperature difference value between the frost critical temperature and the coil temperature is greater than the preset temperature difference threshold value is obtained, the fan is at the first target rotation speed value, step S702 in this embodiment is to control the fan to decrease from the first target rotation speed value to the second target rotation speed value.
Here, in the case of Te-Toil >. DELTA.t, a second compensation amount for the fan rotational speed is also determined in accordance with the amount of change in the exhaust gas temperature.
Specifically, the air conditioner is preset with a corresponding relation between the variation of the exhaust temperature and the compensation amount of the fan rotation speed, and illustratively, when the exhaust temperature decreases by B ℃, the compensation amount corresponding to the rotation speed decreases by B ℃ is R2; for example, the rotational speed is compensated for-10 revolutions per 0.5 ℃ decrease in exhaust temperature.
In the embodiment, the compensation of the fan rotating speed takes the second target rotating speed value as the reference rotating speed, and the exhaust temperature takes the exhaust temperature when the first judgment is judged to meet Te-Toil >. DELTA.t as the reference temperature; for example, when the first determination is that Te-Toil >. DELTA.t is satisfied, the exhaust temperature is 70 ℃, and the second target rotational speed value is 150 r/min; the exhaust temperature is repeatedly detected for a plurality of times, when the detected exhaust temperature is 68.5 ℃, the compensation quantity of the rotation speed can be further calculated and determined to be-20 x 3-60, and the rotation speed of the fan is adjusted to 90r/min from 150 r/min.
Here, the second compensation amount of the rotation speed is associated with the amount of change in the exhaust gas temperature; the second target rotating speed value is smaller than the first target rotating speed value, and the second compensation amount is smaller than the first compensation amount.
Optionally, the control method of the present invention further includes: acquiring the current indoor temperature of a frosting stage of an air conditioner operation self-cleaning mode; determining a preset temperature difference threshold value based on the current indoor temperature and a preset rule; the preset rule is used for representing the corresponding relation between the current indoor temperature and the temperature difference threshold value.
For example, the preset rule is a corresponding relationship between the current indoor temperature and the temperature difference threshold, and in the corresponding relationship, the current indoor temperature and the temperature difference threshold are in positive correlation; under the condition that the current indoor temperature is higher, because the heat exchange with the indoor environment still exists in the self-cleaning process of the air conditioner, and the heat in the indoor environment enters the indoor unit, the temperature range of the indoor unit for frost condensation at a lower condensation speed needs to be increased, the flowing time of the air flow driven by the indoor unit at a target rotating speed value can be further prolonged, the adverse effect of delaying frost formation caused by the heat exchange between the indoor unit and the indoor environment is reduced, and therefore the temperature difference threshold value can be set to be a larger value; on the contrary, under the condition that the current indoor temperature is smaller, the temperature difference threshold value is set to be a smaller value so as to accelerate the whole process of the frost condensation stage.
After the defrosting stage of the air conditioner self-cleaning mode is completed, the air conditioner self-cleaning mode can be switched to the defrosting stage to continue; the control flow of the defrosting stage of the present invention is referred to the description in the foregoing, and is not repeated herein.
Fig. 8 is a flowchart illustrating an eighth method for controlling self-cleaning of an air conditioner according to another exemplary embodiment of the present invention.
As shown in fig. 8, the present invention provides another control method for self-cleaning of an air conditioner, which mainly comprises the following steps:
s801, acquiring the coil temperature and the fan current in the defrosting stage of the air conditioner operation self-cleaning mode;
in this embodiment, the manner of acquiring the temperature of the coil may refer to the step S101 in the foregoing, which is not described herein again.
In this embodiment, the obtaining manner of the fan current may refer to the step S501 in the foregoing, which is not described herein again.
S802, adjusting the rotating speed of the fan based on the temperature comparison result of the coil temperature and the frost critical temperature and the variation of the coil temperature; and determining the compensation amount of the rotating speed according to the variation of the fan current.
The control method for self-cleaning of the air conditioner provided by the invention can adjust the rotating speed of the fan in the frost condensation stage based on the temperature comparison result of the coil temperature and the frost condensation critical temperature and the variation of the coil temperature, is different from the existing running mode that the fan is stopped or the rotating speed is fixed, and the rotating speed of the fan which is dynamically adjusted can be more matched with the temperature variation in the air conditioner, so that the frost condensation rate in the frost condensation stage is accelerated by utilizing the varied rotating speed, the actual frost condensation amount is improved, and the actual cleaning effect of the self-cleaning mode is ensured.
In the embodiment, the fan is provided with at least two wind gears with sequentially increased rotating speeds; here, the wind shield is a wind speed range preset by the air conditioner for the inner fan; for example, the inner fan has a low wind level and a breeze level, and the wind speed of the low wind level is greater than that of the breeze level.
Thus, in step S802, the rotation speed of the fan is adjusted based on the temperature comparison result between the coil temperature and the frost-condensation critical temperature, and the method includes: and when the temperature of the coil pipe is higher than the frost-condensation critical temperature, controlling the fan to operate at a set low wind gear.
For example, the coil temperature is Toil, the frost critical temperature is Te, and when Toil is greater than Te, the fan is set to have a low wind level; at this moment, because the coil pipe temperature is higher than the critical temperature of frost, although the steam in the air can not condense into frost, but begin to be converted into liquid by the gaseous state, the fan moves with low wind-break and can accelerate the inside air flow of indoor set, and the dew that makes the frost in the indoor set can evenly distributed, guarantees that the frost volume of follow-up frost in-process is even, reduces the appearance of local frost layer too thin, the frost of congealing insufficient scheduling problem.
Optionally, in step S802, based on the temperature comparison result between the coil temperature and the frost-condensation critical temperature and the variation of the coil temperature, the rotation speed of the fan is adjusted, further including: when the temperature of the coil pipe is smaller than the frost condensation critical temperature, the temperature difference value between the frost condensation critical temperature and the temperature of the coil pipe is smaller than a preset temperature difference threshold value, and the variation of the temperature of the coil pipe is smaller than a preset variation threshold value, controlling the fan to reduce the rotating speed value corresponding to the low wind gear to a first target rotating speed value;
for example, in the case of Toil < Te, Te-Toil <. DELTA.t, and Delta Toil (variation of coil temperature) <DeltaT (variation threshold), the fan is lowered to a first target rotation speed value from a set low wind speed; at this moment, because the temperature of the inner coil is lower than the frost critical temperature, but the difference between the two is not large, and the variation of the temperature of the coil is smaller than the preset variation threshold, the water vapor in the air is gradually condensed into the frost at a slower condensation speed, the fan operates at a first target rotating speed value lower than the low wind gear to reduce the adverse effect of the excessively fast airflow flow on the condensation of the frost, and the water vapor in the air or the condensed condensate can be ensured to have enough condensation time at the current contact position with the indoor unit component (such as the indoor heat exchanger) to be converted from the gas state or the liquid state into the solid state frost.
Optionally, the first target rotation speed value may be a rotation speed value corresponding to a breeze gear; alternatively, the target rotation speed value may be a rotation speed value between a low wind gear and a breeze gear.
Here, when Toil < Te, Te-Toil < [ delta ] T, and Toil (variation of coil temperature) < [ delta ] T (variation threshold), the first compensation amount for the fan rotational speed is determined based on the variation (delta) i of the fan current.
Specifically, the air conditioner is preset with a corresponding relationship between the variation of the fan current and the compensation amount of the fan rotation speed, and for example, when the fan current decreases by a, the compensation amount corresponding to the rotation speed that decreases by a is R1; for example, the rotational speed is compensated by-20 revolutions per 0.5mA of decrease in fan current.
In the embodiment, the compensation of the fan rotating speed takes a first target rotating speed value as a reference rotating speed, and the fan current takes the fan current which is judged to meet the conditions that the Toil is less than Te and Te-Toil is less than delta t for the first time as a reference current value; for example, when the condition that Toil < Te and Te-Toil < Deltat are satisfied in the first judgment, the fan current is 20mA, and the first target rotating speed value is 200 r/min; the fan current is repeatedly detected for a plurality of times, when the fan current detected for one time is 18mA, the compensation quantity of the rotation speed can be further calculated and determined to be-20 × 4-80, and the rotation speed of the fan is adjusted to 120r/min from 200 r/min.
The compensation adjustment of the fan rotating speed can enable the rotating speed of the fan to be more adaptive to the current frosting condition, and is beneficial to accelerating the condensation speed of frost on the indoor unit.
Optionally, in step S802, based on the temperature comparison result between the coil temperature and the frost-condensation critical temperature and the variation of the coil temperature, the rotation speed of the fan is adjusted, further including: when the temperature difference value between the frost critical temperature and the coil pipe temperature is larger than a preset temperature difference threshold value and the variation of the coil pipe temperature is larger than a preset variation threshold value, controlling the fan to reduce the rotating speed value corresponding to the low wind gear to a second target rotating speed value;
for example, when Te-Toil > -Deltat, and Deltatoil (variation of coil temperature) > -DeltaT (variation threshold), the fan is reduced to a second target rotating speed value from a set low wind gear; at this moment, because the inner coil temperature is less than the critical temperature of frost, the difference between the two is great, and the variation of coil temperature is greater than preset variation threshold, then the steam in the air condenses into the frost gradually with the faster speed of condensing, and the fan can reduce its consumption of operation with the second target rotational speed value operation that is less than low wind shelves, utilizes the further condensation of the transmission realization frost of heat between each solid parts of indoor set, guarantees the frost effect.
Here, the second target rotation speed value is smaller than the first target rotation speed value; when the first target rotation speed value is a wind speed value between a low wind gear and a breeze gear, the second target rotation speed value can be a rotation speed value corresponding to the breeze gear; alternatively, the target rotation speed value may be a rotation speed value between a low wind gear and a breeze gear. And when the first target rotating speed value is the rotating speed value corresponding to the breeze gear, the second target rotating speed value is a rotating speed value lower than the rotating speed value corresponding to the breeze gear.
If the comparison result that the temperature difference value between the frost critical temperature and the coil temperature is greater than the preset temperature difference threshold value is obtained, the fan is at the first target rotation speed value, step S802 in this embodiment is to control the fan to decrease from the first target rotation speed value to the second target rotation speed value.
Here, when Te-Toil > - Δ T and Δ Toil > - Δ T are present, a second compensation amount for the fan rotational speed is determined according to the variation of the fan current.
Specifically, the air conditioner is preset with a corresponding relationship between the variation of the fan current and the compensation amount of the fan rotation speed, and for example, when the fan current decreases by B, the compensation amount corresponding to the rotation speed that decreases by B is R2; for example, the rotational speed is compensated by-10 revolutions for each 1mA decrease in fan current.
In the embodiment, the compensation of the fan rotation speed takes the second target rotation speed value as the reference rotation speed, and the fan current takes the fan current which is judged to meet the condition that Te-Toil > [ delta ] t is firstly judged as the reference current; for example, when the first determination is that Te-Toil >. DELTA.t is satisfied, the fan current is 15mA, and the second target rotation speed value is 150 r/min; and repeatedly detecting the coil temperature for a plurality of times, and when the fan current detected for one time is 13mA, further calculating and determining that the compensation quantity of the rotating speed is-20 x 2-40, and adjusting the rotating speed of the fan from 150r/min to 110 r/min.
Here, the second compensation amount of the rotation speed is associated with the variation amount of the fan current; the second target rotating speed is less than the first target rotating speed, and the second compensation amount is less than the first compensation amount.
Optionally, the control method of the present invention further includes: acquiring the current indoor temperature of a frosting stage of an air conditioner operation self-cleaning mode; determining a preset temperature difference threshold value based on the current indoor temperature and a preset rule; the preset rule is used for representing the corresponding relation between the current indoor temperature and the temperature difference threshold value.
For example, the preset rule is a corresponding relationship between the current indoor temperature and the temperature difference threshold, and in the corresponding relationship, the current indoor temperature and the temperature difference threshold are in positive correlation; under the condition that the current indoor temperature is higher, because the heat exchange with the indoor environment still exists in the self-cleaning process of the air conditioner, and the heat in the indoor environment enters the indoor unit, the temperature range of the indoor unit for frost condensation at a lower condensation speed needs to be increased, the flowing time of the air flow driven by the indoor unit at a target rotating speed value can be further prolonged, the adverse effect of delaying frost formation caused by the heat exchange between the indoor unit and the indoor environment is reduced, and therefore the temperature difference threshold value can be set to be a larger value; on the contrary, under the condition that the current indoor temperature is smaller, the temperature difference threshold value is set to be a smaller value so as to accelerate the whole process of the frost condensation stage.
After the defrosting stage of the air conditioner self-cleaning mode is completed, the air conditioner self-cleaning mode can be switched to the defrosting stage to continue; the control flow of the defrosting stage of the present invention is referred to the description in the foregoing, and is not repeated herein.
In an alternative embodiment, the air conditioning garment generally includes a body and a controller that may be used to control the control flow disclosed in the embodiment of fig. 1 above.
Specifically, the controller is configured to:
acquiring the temperature of a coil pipe in a frost condensation stage of a self-cleaning mode of air conditioner operation;
and adjusting the rotating speed of the fan based on the temperature comparison result of the coil temperature and the frost critical temperature.
In an alternative embodiment, the fan has at least two wind ranges with successively increasing rotational speed;
the controller is specifically configured to:
and when the temperature of the coil pipe is higher than the frost-condensation critical temperature, controlling the fan to operate at a set low wind gear.
In an alternative embodiment, the controller is specifically configured to:
and when the temperature of the coil pipe is less than the frost critical temperature and the temperature difference value between the frost critical temperature and the temperature of the coil pipe is less than a preset temperature difference threshold value, controlling the fan to reduce the rotating speed value corresponding to the low wind gear to a target rotating speed value.
In an alternative embodiment, the controller is further configured to:
acquiring the current indoor temperature of a frosting stage of an air conditioner operation self-cleaning mode;
determining a preset temperature difference threshold value based on the current indoor temperature and a preset rule; the preset rule is used for representing the corresponding relation between the current indoor temperature and the temperature difference threshold value.
In an alternative embodiment, the controller is specifically configured to:
and when the temperature difference value between the frost critical temperature and the temperature of the coil pipe is greater than a preset temperature difference threshold value, controlling the fan to operate at a set low wind gear.
The specific manner in which the controller controls the above process can refer to the foregoing embodiments, and is not described herein again.
In yet another alternative embodiment, the controller of the air conditioning garment may be used to control the control flow disclosed in the embodiment of fig. 2 above.
Specifically, the controller is configured to:
acquiring the temperature of a coil pipe in a frost condensation stage of a self-cleaning mode of air conditioner operation;
adjusting the rotating speed of the fan based on the temperature comparison result of the coil temperature and the frost critical temperature; wherein the rate of adjustment of the rotational speed is determined based on the temperature comparison.
In an alternative embodiment, the fan has at least two wind ranges with successively increasing rotational speed;
the controller is specifically configured to:
and when the temperature of the coil pipe is higher than the frost-condensation critical temperature, controlling the fan to operate at a set low wind gear.
In an alternative embodiment, the controller is specifically configured to:
when the temperature of the coil pipe is lower than the frost critical temperature and the temperature difference value between the frost critical temperature and the temperature of the coil pipe is lower than a preset temperature difference threshold value, controlling the fan to reduce the rotating speed value corresponding to the low wind gear to a first target rotating speed value;
and the fan is reduced to a first target rotating speed value from the rotating speed value corresponding to the low wind gear at a first adjusting speed.
In an alternative embodiment, the controller is further configured to:
acquiring the current indoor temperature of a frosting stage of an air conditioner operation self-cleaning mode;
determining a preset temperature difference threshold value based on the current indoor temperature and a preset rule; the preset rule is used for representing the corresponding relation between the current indoor temperature and the temperature difference threshold value.
In an alternative embodiment, the controller is specifically configured to:
when the temperature difference value between the frost critical temperature and the coil pipe temperature is larger than a preset temperature difference threshold value, controlling the fan to reduce the rotating speed value corresponding to the low wind gear to a second target rotating speed value;
the fan is reduced from the rotating speed value corresponding to the low wind gear to a second target rotating speed value at a second adjusting speed; the second target rotating speed is less than the first target rotating speed, and the first adjusting rate is greater than the second adjusting rate.
The specific manner in which the controller controls the above process can refer to the foregoing embodiments, and is not described herein again.
In yet another alternative embodiment, the controller of the air conditioning garment may be used to control the control flow disclosed in the embodiment of fig. 3 above.
Specifically, the controller is configured to:
acquiring the temperature of a coil pipe in a frost condensation stage of a self-cleaning mode of air conditioner operation;
adjusting the rotating speed of the fan based on the temperature comparison result of the coil temperature and the frost critical temperature; and the compensation amount of the rotating speed is determined according to the variation of the temperature of the coil.
In an alternative embodiment, the fan has at least two wind ranges with successively increasing rotational speed;
the controller is specifically configured to:
and when the temperature of the coil pipe is higher than the frost-condensation critical temperature, controlling the fan to operate at a set low wind gear.
In an alternative embodiment, the controller is specifically configured to:
when the temperature of the coil pipe is lower than the frost critical temperature and the temperature difference value between the frost critical temperature and the temperature of the coil pipe is lower than a preset temperature difference threshold value, controlling the fan to reduce the rotating speed value corresponding to the low wind gear to a first target rotating speed value;
the first compensation amount of the rotation speed is related to the variation amount of the temperature of the coil.
In an alternative embodiment, the controller is further configured to:
acquiring the current indoor temperature of a frosting stage of an air conditioner operation self-cleaning mode;
determining a preset temperature difference threshold value based on the current indoor temperature and a preset rule; the preset rule is used for representing the corresponding relation between the current indoor temperature and the temperature difference threshold value.
In an alternative embodiment, the controller is specifically configured to:
when the temperature difference value between the frost critical temperature and the coil pipe temperature is larger than a preset temperature difference threshold value, controlling the fan to reduce the rotating speed value corresponding to the low wind gear to a second target rotating speed value;
the second compensation amount of the rotating speed is related to the change amount of the temperature of the coil; the second target rotating speed is less than the first target rotating speed, and the second compensation amount is less than the first compensation amount.
The specific manner in which the controller controls the above process can refer to the foregoing embodiments, and is not described herein again.
In yet another alternative embodiment, the controller of the air conditioning garment may be used to control the control flow disclosed in the embodiment of fig. 4 above.
Specifically, the controller is configured to:
acquiring the temperature of a coil pipe in a frost condensation stage of a self-cleaning mode of air conditioner operation;
adjusting the rotating speed of the fan based on the temperature comparison result of the coil temperature and the frost-condensation critical temperature and the variation of the coil temperature; and the compensation amount of the rotating speed is determined according to the variation of the temperature of the coil.
In an alternative embodiment, the fan has at least two wind ranges with successively increasing rotational speed;
the controller is specifically configured to:
and when the temperature of the coil pipe is higher than the frost-condensation critical temperature, controlling the fan to operate at a set low wind gear.
In an alternative embodiment, the controller is specifically configured to:
when the temperature of the coil pipe is smaller than the frost condensation critical temperature, the temperature difference value between the frost condensation critical temperature and the temperature of the coil pipe is smaller than a preset temperature difference threshold value, and the variation of the temperature of the coil pipe is smaller than a preset variation threshold value, controlling the fan to reduce the rotating speed value corresponding to the low wind gear to a first target rotating speed value;
the first compensation amount of the rotation speed is related to the variation amount of the temperature of the coil.
In an alternative embodiment, the controller is further configured to:
acquiring the current indoor temperature of a frosting stage of an air conditioner operation self-cleaning mode;
determining a preset temperature difference threshold value based on the current indoor temperature and a preset rule; the preset rule is used for representing the corresponding relation between the current indoor temperature and the temperature difference threshold value.
In an alternative embodiment, the controller is specifically configured to:
when the temperature difference value between the frost critical temperature and the coil pipe temperature is larger than a preset temperature difference threshold value and the variation of the coil pipe temperature is larger than a preset variation threshold value, controlling the fan to reduce the rotating speed value corresponding to the low wind gear to a second target rotating speed value;
the second compensation amount of the rotating speed is related to the change amount of the temperature of the coil; the second target rotating speed is less than the first target rotating speed, and the second compensation amount is less than the first compensation amount.
The specific manner in which the controller controls the above process can refer to the foregoing embodiments, and is not described herein again.
In yet another alternative embodiment, the controller of the air conditioning garment may be used to control the control flow disclosed in the embodiment of fig. 5 above.
Specifically, the controller is configured to:
acquiring fan current of a frost condensation stage of a self-cleaning mode of air conditioner operation;
and adjusting the rotating speed of the fan based on the comparison result of the fan current and the fan reference current.
In an alternative embodiment, the fan has at least two wind ranges with successively increasing rotational speed;
the controller is specifically configured to:
and when the current of the fan is equal to the reference current of the fan, controlling the fan to operate at a set low wind gear.
In an alternative embodiment, the controller is specifically configured to:
and when the current of the fan is larger than the reference current of the fan, controlling the fan to reduce the rotating speed value corresponding to the low wind gear to the target rotating speed value.
In an alternative embodiment, the controller is specifically configured to:
and when the current difference value between the current of the fan and the reference current of the fan is larger than the current difference threshold value, controlling the fan to operate at a set low wind gear.
In an alternative embodiment, the controller is further configured to:
acquiring the current indoor temperature of a frosting stage of an air conditioner operation self-cleaning mode;
determining a fan reference current based on the current indoor temperature and a preset rule; the preset rule is used for representing the corresponding relation between the current indoor temperature and the fan reference current.
The specific manner in which the controller controls the above process can refer to the foregoing embodiments, and is not described herein again.
In yet another alternative embodiment, the controller of the air conditioning garment may be used to control the control flow disclosed in the embodiment of fig. 6 above.
Specifically, the controller is configured to:
acquiring fan current of a frost condensation stage of a self-cleaning mode of air conditioner operation;
adjusting the rotating speed of the fan based on the comparison result of the fan current and the fan reference current; wherein the rate of adjustment of the rotational speed is determined in response to the rate of change of the fan current.
In an alternative embodiment, the fan has at least two wind ranges with successively increasing rotational speed;
the controller is specifically configured to:
and when the current of the fan is equal to the reference current of the fan, controlling the fan to operate at a set low wind gear.
In an alternative embodiment, the controller is specifically configured to:
when the current of the fan is larger than the reference current of the fan, the fan is controlled to be reduced to a first target rotating speed value from a rotating speed value corresponding to a low wind gear;
the fan is reduced from a rotating speed value corresponding to a low wind gear to a first target rotating speed value at a first adjusting speed; the first rate of adjustment is associated with a rate of change of fan current.
In an alternative embodiment, the adjusting the rotation speed of the fan based on the comparison result of the fan current and the fan reference current further comprises:
when the current difference value between the current of the fan and the reference current of the fan is larger than the current difference threshold value, controlling the fan to reduce the rotating speed value corresponding to the low wind gear to a second target rotating speed value;
the fan is reduced from the rotating speed value corresponding to the low wind gear to a second target rotating speed value at a second adjusting speed; the second rate of adjustment is associated with a rate of change of the coil temperature; the second target rotation speed is less than the first target rotation speed, and the second regulation rate is less than the second regulation rate.
In an optional embodiment, the control method further comprises:
acquiring the current indoor temperature of a frosting stage of an air conditioner operation self-cleaning mode;
determining a fan reference current based on the current indoor temperature and a preset rule; the preset rule is used for representing the corresponding relation between the current indoor temperature and the fan reference current.
The specific manner in which the controller controls the above process can refer to the foregoing embodiments, and is not described herein again.
In yet another alternative embodiment, the controller of the air conditioning garment may be used to control the control flow disclosed above in the embodiment of fig. 7.
Specifically, the controller is configured to:
acquiring the temperature of a coil pipe and the exhaust temperature of a compressor in a frost condensation stage of a self-cleaning mode of air conditioner operation;
adjusting the rotating speed of the fan based on the temperature comparison result of the coil temperature and the frost critical temperature; and determines the compensation amount of the rotation speed according to the variation amount of the exhaust temperature.
In an alternative embodiment, the fan has at least two wind ranges with successively increasing rotational speed;
the controller is specifically configured to:
and when the temperature of the coil pipe is higher than the frost-condensation critical temperature, controlling the fan to operate at a set low wind gear.
In an alternative embodiment, the controller is specifically configured to:
when the temperature of the coil pipe is lower than the frost critical temperature and the temperature difference value between the frost critical temperature and the temperature of the coil pipe is lower than a preset temperature difference threshold value, controlling the fan to reduce the rotating speed value corresponding to the low wind gear to a first target rotating speed value;
the first compensation amount of the rotation speed is associated with the amount of change in the exhaust temperature.
In an alternative embodiment, the controller is further configured to:
acquiring the current indoor temperature of a frosting stage of an air conditioner operation self-cleaning mode;
determining a preset temperature difference threshold value based on the current indoor temperature and a preset rule; the preset rule is used for representing the corresponding relation between the current indoor temperature and the temperature difference threshold value.
In an alternative embodiment, the controller is specifically configured to:
when the temperature difference value between the frost critical temperature and the coil pipe temperature is larger than a preset temperature difference threshold value, controlling the fan to reduce the rotating speed value corresponding to the low wind gear to a second target rotating speed value;
the second compensation amount of the rotation speed is correlated with the variation amount of the exhaust temperature; the second target rotating speed is less than the first target rotating speed, and the second compensation amount is less than the first compensation amount.
The specific manner in which the controller controls the above process can refer to the foregoing embodiments, and is not described herein again.
In yet another alternative embodiment, the controller of the air conditioning garment may be used to control the control flow disclosed in the embodiment of fig. 8 above.
Specifically, the controller is configured to:
acquiring the temperature of a coil pipe in a frost condensation stage of a self-cleaning mode of air conditioner operation;
adjusting the rotating speed of the fan based on the temperature comparison result of the coil temperature and the frost-condensation critical temperature and the variation of the coil temperature; and the compensation amount of the rotating speed is determined according to the variation of the temperature of the coil.
In an alternative embodiment, the fan has at least two wind ranges with successively increasing rotational speed;
the controller is specifically configured to:
and when the temperature of the coil pipe is higher than the frost-condensation critical temperature, controlling the fan to operate at a set low wind gear.
In an alternative embodiment, the controller is specifically configured to:
when the temperature of the coil pipe is smaller than the frost condensation critical temperature, the temperature difference value between the frost condensation critical temperature and the temperature of the coil pipe is smaller than a preset temperature difference threshold value, and the variation of the temperature of the coil pipe is smaller than a preset variation threshold value, controlling the fan to reduce the rotating speed value corresponding to the low wind gear to a first target rotating speed value;
the first compensation amount of the rotating speed is related to the variation amount of the fan current.
In an alternative embodiment, the controller is further configured to:
acquiring the current indoor temperature of a frosting stage of an air conditioner operation self-cleaning mode;
determining a preset temperature difference threshold value based on the current indoor temperature and a preset rule; the preset rule is used for representing the corresponding relation between the current indoor temperature and the temperature difference threshold value.
In an alternative embodiment, the controller is specifically configured to:
when the temperature difference value between the frost critical temperature and the coil pipe temperature is larger than a preset temperature difference threshold value and the variation of the coil pipe temperature is larger than a preset variation threshold value, controlling the fan to reduce the rotating speed value corresponding to the low wind gear to a second target rotating speed value;
the second compensation amount of the rotating speed is related to the variation amount of the fan current; the second target rotating speed is less than the first target rotating speed, and the second compensation amount is less than the first compensation amount.
The specific manner in which the controller controls the above process can refer to the foregoing embodiments, and is not described herein again.
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 (8)

1. A control method for self-cleaning of an air conditioner is characterized by comprising the following steps:
acquiring the temperature of a coil pipe in a frost condensation stage of the air conditioner operation self-cleaning mode;
adjusting the rotating speed of a fan corresponding to the cleaned heat exchanger based on the temperature comparison result of the coil temperature and the frost critical temperature; the fan has two at least rotational speed wind shelves that increase in proper order, works as the coil pipe temperature is less than the critical temperature that congeals frost, just the critical temperature that congeals frost with when the difference in temperature value of coil pipe temperature is less than preset difference in temperature threshold value, control the rotational speed value that the fan corresponds from low wind shelves reduces to target rotational speed value.
2. The control method according to claim 1, wherein the adjusting the rotation speed of the corresponding fan of the cleaned heat exchanger based on the temperature comparison result of the coil temperature and the frost critical temperature comprises:
and when the temperature of the coil pipe is greater than the frost critical temperature, controlling the fan to operate at a set low wind gear.
3. The control method according to claim 2, characterized by further comprising:
acquiring the current indoor temperature of the air conditioner in a defrosting stage of a self-cleaning mode;
determining the preset temperature difference threshold value based on the current indoor temperature and a preset rule; the preset rule is used for representing the corresponding relation between the current indoor temperature and the temperature difference threshold value.
4. The control method according to claim 2, wherein the adjusting the rotation speed of the corresponding fan of the cleaned heat exchanger based on the temperature comparison result of the coil temperature and the frost critical temperature further comprises:
and when the difference between the frost critical temperature and the coil pipe temperature is greater than a preset difference threshold value, controlling the cleaned heat exchanger to operate at the set low wind gear corresponding to the fan.
5. An air conditioner, characterized in that, the air conditioner includes an organism and a controller, wherein, the controller is used for:
acquiring the temperature of a coil pipe in a frost condensation stage of the air conditioner operation self-cleaning mode;
adjusting the rotating speed of a fan corresponding to the cleaned heat exchanger based on the temperature comparison result of the coil temperature and the frost critical temperature; the fan has two at least rotational speed wind shelves that increase in proper order, works as the coil pipe temperature is less than the critical temperature that congeals frost, just the critical temperature that congeals frost with when the difference in temperature value of coil pipe temperature is less than preset difference in temperature threshold value, control the rotational speed value that the fan corresponds from low wind shelves reduces to target rotational speed value.
6. The air conditioner of claim 5, wherein the controller is specifically configured to:
and when the temperature of the coil pipe is greater than the frost critical temperature, controlling the fan to operate at a set low wind gear.
7. The air conditioner of claim 6, wherein the controller is further configured to:
acquiring the current indoor temperature of the air conditioner in a defrosting stage of a self-cleaning mode;
determining the preset temperature difference threshold value based on the current indoor temperature and a preset rule; the preset rule is used for representing the corresponding relation between the current indoor temperature and the temperature difference threshold value.
8. The air conditioner of claim 6, wherein the controller is specifically configured to:
and when the difference between the frost critical temperature and the temperature of the coil pipe is greater than a preset difference threshold value, controlling the fan to operate at the set low wind gear.
CN201811007084.6A 2018-08-31 2018-08-31 Air conditioner and self-cleaning control method thereof Active CN110873418B (en)

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KR101680696B1 (en) * 2014-12-31 2016-12-12 주식회사 삼지에이 HEPA Filter Replacement Alarm System in Industrial Clean Room
CN104848738B (en) * 2015-04-22 2019-03-19 珠海格力电器股份有限公司 The clean method and device of air-conditioning indoor heat exchanger
CN104764171B (en) * 2015-04-27 2017-10-27 珠海格力电器股份有限公司 Air conditioner and its control method and device
CN106556106B (en) * 2016-11-09 2020-03-31 青岛海尔空调器有限总公司 Control method and device for self-cleaning of indoor unit of air conditioner
CN107525221A (en) * 2017-07-31 2017-12-29 青岛海尔空调器有限总公司 A kind of self-cleaning control method and device of air-conditioning
CN108413578B (en) * 2018-02-14 2020-04-24 青岛海尔空调器有限总公司 Self-cleaning control method for air conditioner

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