CN110736189B - Self-cleaning control method and device for air conditioner - Google Patents
Self-cleaning control method and device for air conditioner Download PDFInfo
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- CN110736189B CN110736189B CN201910891079.4A CN201910891079A CN110736189B CN 110736189 B CN110736189 B CN 110736189B CN 201910891079 A CN201910891079 A CN 201910891079A CN 110736189 B CN110736189 B CN 110736189B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G15/00—Details
- F28G15/003—Control arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/22—Cleaning ducts or apparatus
Abstract
The invention discloses a control method and a device for self-cleaning of an air conditioner, and belongs to the technical field of self-cleaning of air conditioners. The control method comprises the following steps: when the first defrosting mode of the air conditioner is operated and meets the first defrosting completion condition, the air conditioner is controlled to operate in the first defrosting mode; when the running time of the first defrosting mode meets the defrosting time, controlling to run in a second defrosting mode; and if the second frost finishing condition is met, controlling to switch the second frost removing mode to operate. The control method adopts two continuous self-cleaning processes of frost condensation and defrosting, and sets the defrosting time duration of the first defrosting as the characteristic defrosting time duration, so that the condensed water melted during the first defrosting can flow to deep positions such as fin gaps and the like, and the condensed water is not completely separated from the heat exchanger, and further, the second defrosting is utilized to realize frost condensation and dust stripping of the condensed water at the positions such as the fin gaps and the like, thereby improving the integral cleaning effect of the air conditioner and reducing the accumulation of dust at the deep positions of the heat exchanger.
Description
The application is a divisional application with the application number of 201710449089.3 and the name of a control method and a device for self-cleaning of an air conditioner, and the application date of the master case is 2017, 06 and 14.
Technical Field
The invention relates to the technical field of self-cleaning of air conditioners, in particular to a control method and a device for self-cleaning of an air conditioner.
Background
When the indoor unit of the air conditioner operates in a cooling or heating mode, air in the indoor environment enters the indoor unit along the air inlet of the indoor unit and is blown into the indoor environment again through the air outlet after heat exchange of the heat exchange plates, in the process, impurities such as dust, large particles and the like mixed in the indoor air can also enter the indoor machine along with the air flow of the inlet air, although the dustproof filter screen arranged at the air inlet of the indoor unit can filter most of dust and particles, but a small amount of fine dust is not completely blocked and filtered, and with the long-term use of the air conditioner, the dust will gradually deposit and adhere to the surfaces of the heat exchanger fins, and since the dust covering the outer surfaces of the heat exchanger is less thermally conductive, it directly affects the heat exchange between the heat exchange fins and the indoor air, so that the indoor unit needs to be cleaned regularly to ensure the heat exchange efficiency of the indoor unit.
Generally, a cleaning method of an indoor unit of an air conditioner in the prior art mainly comprises 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 defrosting stage and a defrosting stage, wherein in the defrosting stage, the air conditioner firstly operates in a refrigeration mode, and the output quantity of a refrigerant to an indoor heat exchanger is increased, 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, so that the frost layer condensed on the outer surface of the heat exchanger is melted, and dust is collected into the water receiving tray along with the melted water flow, so that the aim of self-cleaning the air conditioner can be fulfilled.
However, for the existing air conditioner structure, the frost layer condensed in the frost condensation stage is mainly concentrated on the outer surface of the heat exchanger, and the frost condensed between the fins of the heat exchanger is less, so that dust between the fins cannot be peeled off in the manner of freezing and frost condensation, and the fins can be cleaned only by flushing of the condensed water melted in the defrosting stage, and the dust removal effect is poor.
Disclosure of Invention
The invention provides a control method and a control device for self-cleaning of an air conditioner, and aims to solve the problem that the conventional self-cleaning mode cannot clean deep positions such as fin gaps of a heat exchanger. 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: when the first defrosting mode of the air conditioner is operated and meets the first defrosting completion condition, the air conditioner is controlled to operate in the first defrosting mode; when the running time of the first defrosting mode meets the defrosting time, controlling to run in a second defrosting mode, wherein the defrosting time is the time for frost condensed by the heat exchanger to melt and remain between the fins of the heat exchanger after the first defrosting mode is switched to run; and if the second frost finishing condition is met, controlling to switch the second frost removing mode to operate.
Further, the control method comprises the following steps: acquiring the indoor environment temperature of a space where an air conditioner is located; and determining the defrosting time according to the indoor environment temperature.
Further, determining the defrosting time according to the indoor environment temperature comprises the following steps: and determining the defrosting time corresponding to the indoor environment temperature according to the preset incidence relation between the indoor environment temperature and the defrosting time.
Further, determining the defrosting time corresponding to the indoor environment temperature according to the preset incidence relation between the indoor environment temperature and the defrosting time, including: the defrosting time is calculated according to the following formula: t isDefrosting creamK/Tw-Tb, wherein TDefrosting creamAnd Tw is the indoor environment temperature, K is the preset defrosting calculation coefficient, and Tb is the defrosting time compensation amount.
Further, the control method further comprises: acquiring the indoor environment temperature of a space where an air conditioner is located; and if the indoor environment temperature is lower than the set temperature threshold, starting the electric auxiliary heating operation of the air conditioner when the air conditioner operates in the first defrosting mode.
According to a second aspect of the present invention, there is also provided a control apparatus for self-cleaning of an air conditioner, the control apparatus comprising: the first module is used for controlling the air conditioner to operate in a first defrosting mode when the first defrosting mode for operation meets a first defrosting completion condition; the second module is used for controlling the second defrosting mode to operate when the operation time length of the first defrosting mode meets the defrosting time length, wherein the defrosting time length is the time length for frost condensed by the heat exchanger to melt and remain between the fins of the heat exchanger after the operation of the first defrosting mode is switched; and the third module is used for controlling to switch the second defrosting mode to operate if the second defrosting completion condition is met.
Further, the control device further includes: the first acquisition module is used for acquiring the indoor environment temperature of the space where the air conditioner is located; and the determining module is used for determining defrosting time according to the indoor environment temperature. The determination module is to: and determining the defrosting time corresponding to the indoor environment temperature according to the preset incidence relation between the indoor environment temperature and the defrosting time.
Further, the determining module is configured to: the defrosting time is calculated according to the following formula: t isDefrosting creamK/Tw-Tb, wherein TDefrosting creamAnd Tw is the indoor environment temperature, K is the preset defrosting calculation coefficient, and Tb is the defrosting time compensation amount.
Further, the control device further includes: the second acquisition module is used for acquiring the indoor environment temperature of the space where the air conditioner is located; and the fourth module is used for starting the electric auxiliary heating operation of the air conditioner when the air conditioner operates in the first defrosting mode if the indoor environment temperature is lower than the set temperature threshold.
The control method adopts two continuous self-cleaning processes of frost condensation and defrosting, and the defrosting time duration for the first time is set to be within a specific defrosting time duration, so that the condensed water melted during the first defrosting can flow to deep parts such as fin gaps and the like, and the condensed water is not completely separated from the heat exchanger, and further, the second defrosting is utilized to realize frost condensation and dust stripping of the condensed water at the positions such as the fin gaps and the like, the integral cleaning effect of the air conditioner is improved, and the accumulation of dust at the deep parts of the heat exchanger is reduced.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a first flowchart illustrating a control method of the present invention according to an exemplary embodiment;
FIG. 2 is a flowchart II illustrating a control method of the present invention according to an exemplary embodiment;
fig. 3 is a block diagram showing the structure of a control apparatus of the present invention according to an exemplary embodiment.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims. Embodiments may be referred to herein, individually or collectively, by the term "invention" merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in fact disclosed. Herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. As for the methods, products and the like disclosed by the embodiments, the description is simple because the methods correspond to the method parts disclosed by the embodiments, and the related parts can be referred to the method parts for description.
Generally, an existing air conditioner includes an indoor heat exchanger, an outdoor heat exchanger, a throttling device, and a compressor, the indoor heat exchanger, the outdoor heat exchanger, the throttling device, and the compressor are connected by a refrigerant pipeline to form a refrigerant circulation loop, and a refrigerant flows along flow directions set by different operation modes through the refrigerant circulation loop, so as to realize functions of heating, refrigerating, defrosting, and the like.
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-selected functional mode, and can automatically clean the heat exchanger under the condition that dust and dirt are accumulated on the heat exchanger.
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 existing air conditioner is the indoor heat exchanger, and the self-cleaning process in the following embodiments is also the self-cleaning object of the indoor heat exchanger. However, this does not mean that the control method of the present invention cannot be applied to the self-cleaning operation of the outdoor heat exchanger, and it should be understood that if the existing air conditioner performs the self-cleaning operation of the outdoor heat exchanger using the same or similar control method as the present invention, it should be included in the scope of the present invention.
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.
The working process of the air conditioner in the self-cleaning operation mode mainly comprises four stages which are sequentially carried out: the defrosting method comprises a first defrosting stage, a second defrosting stage and a second defrosting stage, wherein a first defrosting mode is operated in the first defrosting stage so that the indoor heat exchanger of the indoor unit is iced and frosted; operating a first defrosting mode in a first defrosting stage to melt the frost condensed by the indoor heat exchanger in the first defrosting stage; operating a second defrosting mode in a second defrosting stage to make the indoor heat exchanger of the indoor unit condensate and frost again; and operating a second defrosting mode in a second defrosting stage so as to melt the frost condensed by the indoor heat exchanger in the second defrosting stage.
In the process of the air conditioner running in the cooling mode, if the power of the compressor is improved and the output quantity of the refrigerant is increased, the quantity of the low-temperature refrigerant 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.
Optionally, the first frost forming mode operated in the first frost forming stage and the second frost forming mode operated in the second frost forming stage may be the same or different. The operation parameters of the components such as the opening degree of the compressor, the fan and the throttling device when the air conditioner operates in the first frost condensing mode of the self-cleaning mode and the operation parameters of the components such as the compressor, the fan and the throttling device when the air conditioner operates in the second frost condensing mode of the self-cleaning mode can be adjusted by the same parameters or can be adjusted by the same parameters.
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 ℃), 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 air conditioner has the refrigerant flow direction limited by the heating mode, 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.
In another embodiment, the defrosting operation of the air conditioner is to defrost by naturally raising the temperature of the indoor heat exchanger through heat transfer of the indoor environment. Specifically, the compressor of the air conditioner stops running in the defrosting stage, no refrigerant passes through the indoor heat exchanger, and the internal temperature of the indoor unit is far lower than the indoor environment temperature, so that the heat of the indoor environment is transferred to the inside of the indoor unit, and an icing layer on the indoor heat exchanger is gradually heated and melted under the influence of the indoor environment temperature, and the defrosting and deicing purposes can be achieved.
Optionally, the first defrosting mode operated in the first defrosting stage and the second defrosting mode operated in the second defrosting stage may be the same or different. The operation parameters of the components such as the opening degree of the compressor, the fan and the throttling device when the air conditioner operates in the first defrosting mode of the self-cleaning mode and the operation parameters of the components such as the compressor, the fan and the throttling device when the air conditioner operates in the second defrosting mode of the self-cleaning mode can be adjusted by the same parameters or can be adjusted by the same parameters.
Fig. 1 is a first flowchart illustrating a control method of the present invention according to an exemplary embodiment.
The invention provides a control method for self-cleaning of an air conditioner, which can be used for controlling the cleaning process of the air conditioner to a heat exchanger, and specifically comprises the following steps:
s101, when the first defrosting mode of the air conditioner is operated and meets a first defrosting completion condition, controlling the air conditioner to operate in a first defrosting mode;
in this embodiment, the air conditioner may operate the self-cleaning mode according to the received self-cleaning instruction, and if the user feels that there is much dust in the indoor unit of the air conditioner and needs to clean, the self-cleaning instruction may be input through a remote controller or a control panel on the air conditioner body, and the air conditioner may control the self-cleaning mode to operate after receiving the self-cleaning instruction.
When the air conditioner starts to operate in the self-cleaning mode, the air conditioner firstly operates according to the first frost condensation mode, the internal temperature of the indoor unit is reduced by adjusting the operating parameters of the compressor, the fan, the throttling device and other components, and when the internal temperature of the indoor unit is reduced to be lower than a frost condensation critical temperature value, the indoor heat exchanger starts to gradually condense a frost layer so as to peel dust from the surface of the indoor heat exchanger by using the frost layer.
Meanwhile, in the process that the air conditioner operates in the first frost condensation mode, the air conditioner judges whether a set first frost condensation finishing condition is met, and if the first frost condensation finishing condition is not met, the air conditioner continues to operate in the first frost condensation mode; and if the first frost completion condition is met, controlling the air conditioner to stop operating the first frost formation mode, ending the first frost formation stage, switching to the first frost purification stage, and operating the air conditioner in the first frost purification mode.
Specifically, be provided with first temperature sensor on the interior coil pipe of air conditioner, the in-process of the first mode of congealing of operation of air conditioner, the temperature of coil pipe in the air conditioner detects through first temperature sensor, is less than or equal to the first temperature threshold value of settlement at interior coil pipe temperature, and the duration of operation of compressor is more than or equal to first length of time when setting up, satisfies first condition of congealing.
Or when the temperature of the inner coil pipe is less than or equal to the set second temperature threshold and the duration is greater than or equal to the second set duration, the first frost completion condition is met.
Of course, the first frost completion condition of the present invention may also be determined according to other air conditioner parameters, and the present invention is not limited thereto.
S102, when the running time of the first defrosting mode meets the defrosting time, controlling to run in a second defrosting mode;
the defrosting time duration is the time duration that frost condensed by the heat exchanger is melted and remains between the fins of the heat exchanger after the operation of the first defrosting mode is switched;
in this embodiment, unlike the defrosting stage in which the frost is completely melted and drips from the indoor heat exchanger in the existing air conditioner self-cleaning process, the operation duration of the first defrosting mode in the first defrosting stage of the present invention is the set defrosting duration. During the defrosting period, the frost layer on the indoor heat exchanger begins to gradually melt into condensed water and flows along the outer surface of the indoor heat exchanger under the action of gravity, so that the condensed water can flow to deep parts such as fin gaps of the indoor heat exchanger and be mixed with dust accumulated on the deep parts.
Meanwhile, in the defrosting time period, condensed water generated on the indoor heat exchanger is also remained between the outer surface of the heat exchanger and the fins, and enough ice-condensing water quantity can be reserved for a second defrosting stage when the second defrosting mode is operated, so that the cleaning and dust removing effects are ensured.
Like this, when the length of time of the operation of first defrosting mode satisfies the length of time of defrosting, control the air conditioner and operate with the second mode of defrosting, the inside temperature of the indoor set of air conditioner begins to reduce again, and when inside temperature reduces to the critical temperature value of defrosting, the comdenstion water will condense again on indoor heat exchanger with the frost state, and, because in first defrosting stage, the comdenstion water flows deep position such as fin clearance, consequently, can utilize the cold expansive force after freezing to carry out more deep automatically cleaning to the fin clearance, improve the stripping effect to impurity such as dust.
And S103, controlling to switch the second frost removal mode to operate if the second frost removal completion condition is met.
In this embodiment, in the process of operating the air conditioner in the second defrosting mode, the air conditioner determines whether a set second defrosting completion condition is met, and if the set second defrosting completion condition is not met, the air conditioner continues to operate in the second defrosting mode; and if the second frost completion condition is met, controlling the air conditioner to stop operating the second frost formation mode, ending the second frost formation stage, switching to the second frost removal stage, and operating the air conditioner in the second frost removal mode.
Optionally, the second frost-forming completion condition of the present invention may be the same as or different from the first frost-forming completion condition, and the present invention is not described herein again.
When the second frost-condensation finishing condition is met, the air conditioner is controlled to be switched to a second frost-condensation mode to operate, so that frost condensed on the outer surface of the indoor heat exchanger and the gaps of the fins is melted, condensed water gradually drips into the water pan, and dust on the indoor heat exchanger can be flushed away together, so that the purpose of self-cleaning the indoor heat exchanger is achieved.
In this embodiment, in the first defrosting stage, the indoor heat exchanger is defrosted in the second manner in the foregoing embodiments, that is, the frost layer on the indoor heat exchanger is naturally melted by using the heat of the indoor environment. Because the compressor stops continuously inputting the low-temperature refrigerant to the indoor heat exchanger and the heat of the indoor environment is transferred to the interior of the indoor unit, the indoor environment temperature can directly influence the melting rate of the frost layer on the indoor heat exchanger, and the higher the indoor environment temperature is, the faster the melting rate of the frost is, the shorter the defrosting time is, and vice versa. Therefore, the invention obtains the indoor environment temperature of the space where the air conditioner is located, and determines the defrosting time according to the indoor environment temperature.
In an embodiment, the air conditioner is provided with a second temperature sensor or is externally connected with the second temperature sensor, and the second temperature sensor can be used for detecting the indoor environment temperature so as to determine the defrosting time of the air conditioner in the first defrosting mode according to the indoor environment temperature.
In one embodiment, the correlation data between the indoor environment temperature and the defrosting time can be obtained through a large number of experiments before the air conditioner leaves the factory, and the correlation relationship between the indoor environment temperature and the defrosting time is determined according to the correlation data, for example, in the correlation relationship, when the indoor environment is at 15 ℃, 20 ℃, 25 ℃ and 30 ℃, the defrosting time is 2min, 1min40s, 1min20s and 1min respectively. The correlation between different indoor ambient temperatures and their corresponding defrosting durations may be stored in a table form.
Therefore, by presetting the association relationship in the air conditioner, when the air conditioner runs in the self-cleaning mode, the defrosting time length of the air conditioner running in the first defrosting mode under the condition of the current indoor environment temperature can be determined by matching the corresponding defrosting time length in the association relationship according to the detected current indoor environment temperature.
In an embodiment, the association is stored in the form of a calculation formula. According to the correlation data obtained by the experiment, a calculation formula of the indoor environment temperature and the defrosting time can be fitted, so that the defrosting time when the air conditioner operates in the first defrosting mode under the condition of the current indoor environment temperature can be determined by calculating the corresponding defrosting time in the calculation formula according to the detected current indoor environment temperature.
In a specific embodiment, the calculation formula of the defrosting time and the indoor environment temperature is as follows:
Tdefrosting cream＝K/Tw-Tb，
Wherein, TDefrosting creamAnd Tw is the indoor environment temperature, K is the preset defrosting calculation coefficient, and Tb is the defrosting time compensation amount.
In the embodiment, K is related to the type and size of the indoor heat exchanger, and after the first time of frost condensation, different and similar internal K values are different, so that the K value can be predetermined according to the type of the indoor heat exchanger assembled by the air conditioner before the air conditioner leaves a factory.
The Tb value is related to the indoor environment temperature, and the compensation value Tb is not in a linear relation with the environment temperature, so that the correlation table of Tb and the indoor environment temperature can be determined according to experimental data and stored in the built-in program of the air conditioner. Thus, after the current indoor ambient temperature is determined, the Tb value can be determined by means of a table lookup.
In an embodiment, at the end of the first frost formation stage of the air conditioner, the compressor is stopped, the stop state is maintained in the first frost formation stage, and the compressor of the air conditioner is restarted to run in the second frost formation stage. Therefore, when the air conditioner operates in the second defrosting mode, a starting instruction is sent to the compressor, and the initialization time of tens of seconds is from the time when the compressor receives the starting instruction to the time when the compressor is normally started, and the indoor heat exchanger continues defrosting at the stage. Meanwhile, the temperature of the indoor heat exchanger during defrosting is higher than the frost critical temperature value, so that the indoor unit does not frost at the stage before the temperature of the indoor heat exchanger is reduced below the frost critical temperature value again after the compressor is formally started, and the defrosting process is still continued, so that Tb is compensated in the calculation formula to compensate the time length from the time when the compressor receives the starting instruction to the time when the temperature of the indoor heat exchanger is reduced below the frost critical temperature value again.
In the embodiment of the invention, if the air conditioner performs self-cleaning in winter in low-temperature weather, when the indoor heat exchanger is defrosted in the first defrosting stage by adopting the second mode in the embodiment, because the indoor environment temperature is lower and the temperature difference between the indoor environment temperature and the indoor unit is smaller, the heat transferred from the indoor environment to the indoor unit is also smaller, which results in prolonging the duration of the defrosting time, therefore, in order to accelerate the defrosting rate when the air conditioner operates in the first defrosting mode and shorten the defrosting time, the air conditioner can judge whether the current indoor environment temperature is lower than the set temperature threshold, and if so, the air conditioner can control the electric auxiliary heating function of the air conditioner to be started so as to accelerate the melting rate of the frost layer on the indoor heat exchanger by using the heat generated by electric auxiliary heating. And if the indoor environment temperature is not lower than the set temperature threshold, the air conditioner still operates in the set first defrosting mode, and the electric auxiliary heating operation of the air conditioner is not started.
Fig. 2 is a flowchart ii illustrating a control method of the present invention according to an exemplary embodiment.
In the application scenario shown in fig. 2, the specific process of the air conditioner of the present invention for performing self-cleaning operation is as follows:
s201, receiving a self-cleaning instruction input by a user;
in this embodiment, a user selects a preset self-cleaning option through a remote controller or a control panel and determines the self-cleaning option; the remote controller or the control panel sends a self-cleaning instruction to the main controller of the air conditioner, and the main controller of the air conditioner can control the air conditioner to enter a self-cleaning mode after receiving the self-cleaning instruction;
s202, the air conditioner operates in a first frost forming mode;
in an embodiment, when the air conditioner operates in the first frost condensing mode, the refrigerant circulates in the same flow direction as the cooling mode, and the refrigerant flowing to the indoor heat exchanger is a low-temperature refrigerant.
Meanwhile, the running power of the compressor is improved to increase the output quantity of the refrigerant; the air deflector of the indoor unit is closed, and the inner fan is stopped, so that the temperature influence on the indoor environment is reduced.
S203, determining whether the first frost formation completion condition is satisfied? If yes, executing step S204, if no, continuing to execute step S202;
in an embodiment, the first frost completion condition is that the inner coil temperature is less than or equal to a set first temperature threshold, and the continuous operation time of the compressor is greater than or equal to a first set time.
Thus, step S203 includes a first substep of obtaining the temperature of the inner coil, and the duration of the compressor operation in the first frost mode.
Or the first frost completion condition is that the temperature of the inner coil is less than or equal to a set second temperature threshold and the duration is greater than or equal to a second set duration.
Thus, step S203 includes a second sub-step of obtaining the temperature of the inner coil, and in the first frost formation mode, the duration of time that the temperature of the inner coil is less than or equal to the set second temperature threshold value
S204, acquiring indoor environment temperature;
in an embodiment, the indoor ambient temperature is detected by a second temperature sensor provided on the indoor unit.
S205, determining defrosting time according to the indoor environment temperature;
in the embodiment, the detected indoor environment temperature is substituted into the calculation formula TDefrosting creamCalculated T in K/Tw-TbDefrosting creamThe defrosting time required by the air conditioner to operate the second defrosting mode is the lasting defrosting time;
s206, the air conditioner operates in a first defrosting mode;
in an embodiment, when the air conditioner operates in the first defrosting mode, the compressor stops operating, and a refrigerant in the air conditioner stops flowing and circulating.
Meanwhile, an air deflector of the indoor unit is opened, and the inner fan is operated or kept in a stop state, so that heat of an indoor environment can be transferred to the inside of the indoor unit, and a frost layer condensed on the outer surface of the indoor heat exchanger begins to melt.
S207, determining whether the time period during which the air conditioner is operated in the first defrosting mode is greater than or equal to a defrosting time period? If yes, executing step S208, if no, continuing to execute step S206;
s208, the air conditioner operates in a second frost condensation mode;
optionally, the parameter adjustment of the compressor, the fan, the throttling device and other components when the air conditioner operates in the second frost formation mode is the same as the adjustment when the air conditioner operates in the first frost formation mode, and details are not repeated here.
S209, determine whether the second frost completion condition is satisfied? If yes, executing step S210, if no, continuing to execute step S208;
optionally, the second frost completing condition is the same as the first frost completing condition, and is not described again.
And S210, the air conditioner operates in a second defrosting mode, and the process is ended.
Therefore, through two continuous defrosting-defrosting stages, and the time length of the first defrosting stage is controlled within the set defrosting time length, dust and impurities at deep positions such as fin gaps can be cleaned, and the self-cleaning effect of the air conditioner is effectively improved.
Fig. 3 is a block diagram showing the structure of a control apparatus of the present invention according to an exemplary embodiment.
The invention also provides a control device for self-cleaning of the air conditioner, which comprises: a first module 301, configured to control to operate in a first defrosting mode when a first defrosting mode in which the air conditioner operates meets a first defrosting completion condition; a second module 302, configured to control to operate in the second defrosting mode when an operation duration of the first defrosting mode meets a defrosting duration, where the defrosting duration is a duration during which frost condensed by the heat exchanger is melted and remains between fins of the heat exchanger after the operation in the first defrosting mode is switched; a third module 303, configured to control to switch the second defrosting mode to operate if the second defrosting completion condition is met.
In an embodiment, the control device further comprises: a first obtaining module 304, configured to obtain an indoor ambient temperature of a space where the air conditioner is located; the determining module 305 is configured to determine a defrosting time according to the indoor environment temperature.
In an embodiment, the determination module 305 is configured to: and determining the defrosting time corresponding to the indoor environment temperature according to the preset incidence relation between the indoor environment temperature and the defrosting time.
In an embodiment, the determination module 305 is configured to: the defrosting time is calculated according to the following formula: t isDefrosting creamK/Tw-Tb, wherein TDefrosting creamAnd Tw is the indoor environment temperature, K is the preset defrosting calculation coefficient, and Tb is the defrosting time compensation amount.
In an embodiment, the control device further comprises: a second obtaining module 306, configured to obtain an indoor ambient temperature of a space where the air conditioner is located; a fourth module 307, configured to, if the indoor ambient temperature is lower than the set temperature threshold, turn on the electric auxiliary heating operation of the air conditioner when the air conditioner operates in the first defrosting mode.
It is to be understood that the present invention is not limited to the procedures and structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. A control method for self-cleaning of an air conditioner is characterized by comprising the following steps:
when the air conditioner operates in a first defrosting mode to meet a first defrosting completion condition, controlling the air conditioner to operate in a first defrosting mode, and when the air conditioner operates in the first defrosting mode, opening an air deflector of an indoor unit;
when the running time of the first defrosting mode meets the defrosting time, controlling to run in a second defrosting mode, wherein the defrosting time is the time for frost condensed by the heat exchanger to melt and remain between the fins of the heat exchanger after the first defrosting mode is switched to run;
if the second frost finishing condition is met, controlling to switch the second frost removing mode to operate,
and the running parameters of the compressor, the fan and the throttling device when the air conditioner runs in the first frost condensing mode are the same as the running parameters of the compressor, the fan and the throttling device when the air conditioner runs in the second frost condensing mode.
2. The control method according to claim 1, characterized by comprising:
acquiring the indoor environment temperature of the space where the air conditioner is located;
and determining the defrosting time according to the indoor environment temperature.
3. The control method according to claim 2, wherein the determining the defrosting time period according to the indoor ambient temperature includes:
and determining the defrosting time corresponding to the indoor environment temperature according to the preset incidence relation between the indoor environment temperature and the defrosting time.
4. The control method according to claim 3, wherein the determining the defrosting time duration corresponding to the indoor environment temperature according to the preset correlation between the indoor environment temperature and the defrosting time duration includes: the defrosting time is calculated according to the following formula:
Tdefrosting cream＝K/Tw-Tb，
Wherein, TDefrosting creamAnd Tw is the indoor environment temperature, K is a preset defrosting calculation coefficient, and Tb is the defrosting time compensation amount.
5. The control method according to claim 1, characterized by further comprising:
acquiring the indoor environment temperature of the space where the air conditioner is located;
and if the indoor environment temperature is lower than a set temperature threshold, starting the electric auxiliary heating operation of the air conditioner when the air conditioner operates in a first defrosting mode.
6. A control apparatus for self-cleaning of an air conditioner, the control apparatus comprising:
the first module is used for controlling the air conditioner to operate in a first defrosting mode when the first defrosting mode of the air conditioner is operated and meets a first defrosting completion condition, and an air deflector of the indoor unit is opened when the air conditioner operates in the first defrosting mode;
the second module is used for controlling the second defrosting mode to operate when the operation time length of the first defrosting mode meets the defrosting time length, wherein the defrosting time length is the time length for frost condensed by the heat exchanger to melt and remain between the fins of the heat exchanger after the operation of the first defrosting mode is switched;
a third module for controlling to switch the second defrosting mode to operate if the second defrosting completion condition is satisfied,
and the running parameters of the compressor, the fan and the throttling device when the air conditioner runs in the first frost condensing mode are the same as the running parameters of the compressor, the fan and the throttling device when the air conditioner runs in the second frost condensing mode.
7. The control device according to claim 6, characterized by further comprising:
the first acquisition module is used for acquiring the indoor environment temperature of the space where the air conditioner is located;
and the determining module is used for determining the defrosting time according to the indoor environment temperature.
8. The control apparatus of claim 7, wherein the determination module is configured to:
and determining the defrosting time corresponding to the indoor environment temperature according to the preset incidence relation between the indoor environment temperature and the defrosting time.
9. The control apparatus of claim 8, wherein the determination module is configured to: calculating the defrosting time according to the following formula:
Tdefrosting cream＝K/Tw-Tb，
Wherein, TDefrosting creamAnd Tw is the indoor environment temperature, K is a preset defrosting calculation coefficient, and Tb is the defrosting time compensation amount.
10. The control device according to claim 6, characterized by further comprising:
the second acquisition module is used for acquiring the indoor environment temperature of the space where the air conditioner is located;
and the fourth module is used for starting the electric auxiliary heating operation of the air conditioner when the air conditioner operates in the first defrosting mode if the indoor environment temperature is lower than a set temperature threshold value.
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| CN110736186B (en) | 2021-04-20 |
| CN110736187A (en) | 2020-01-31 |
| CN110736188A (en) | 2020-01-31 |
| CN110736187B (en) | 2021-04-20 |
| CN110736188B (en) | 2021-04-20 |
| CN110736190B (en) | 2021-04-20 |
| CN110736189A (en) | 2020-01-31 |
| CN107166670B (en) | 2019-12-06 |
| CN110736186A (en) | 2020-01-31 |
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| CN107166670A (en) | 2017-09-15 |
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Effective date of registration: 20210416 Address after: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Applicant after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Applicant after: Haier Zhijia Co.,Ltd. Address before: 266101 Haier Industrial Park, Haier Road, Laoshan District, Shandong, Qingdao, China Applicant before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. |
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