Air conditioner and self-cleaning control method, device, storage medium and program product thereof

Abstract

The application provides an air conditioner and a self-cleaning control method, device, storage medium and program product thereof, and belongs to the field of energy-saving refrigeration and air conditioning equipment.The method comprises the following steps: collecting an operating parameter of an outdoor unit fan of the air conditioner during operation of the air conditioner; calculating a wind resistance coefficient of the outdoor unit fan according to the collected operating parameter; determining a dirty blockage level of the outdoor unit fan according to the calculated wind resistance coefficient of the outdoor unit fan; and controlling the air conditioner to perform self-cleaning when it is determined that the dirty blockage level of the outdoor unit fan reaches a preset level or above.The scheme provided by the application can identify the dirty blockage level of the outdoor unit fan and automatically perform self-cleaning.

Description

Technical Field

[0001] This invention relates to the field of control, and more particularly to an air conditioner and its self-cleaning control method, device, storage medium and program product, belonging to energy-saving refrigeration and air conditioning equipment. Background Technology

[0002] As a core component for heat exchange, the outdoor unit of an air conditioner is exposed to the outdoor environment for extended periods, making it prone to accumulating dust, catkins, and sediment, which can clog the condenser fins. When the fins are dusty, the air conditioner's heat exchange efficiency decreases, energy consumption increases, and the compressor ages faster, shortening the equipment's lifespan. Therefore, it is necessary to assess the degree of clogging in the outdoor unit and implement self-cleaning accordingly. Summary of the Invention

[0003] The technical problem to be solved by this invention is that related technologies require determining the degree of dirt and blockage in the outdoor unit of an air conditioner in order to perform self-cleaning of the outdoor unit. This invention provides an air conditioner and its self-cleaning control method, device, storage medium and program product, which belong to energy-saving refrigeration and air conditioning equipment.

[0004] This invention provides a self-cleaning control method for an air conditioner, comprising: during the operation of the air conditioner, when a preset cleaning cycle is met, collecting the operating parameters of the outdoor unit fan of the air conditioner; calculating the drag coefficient of the outdoor unit fan based on the collected operating parameters; determining the dirt level of the outdoor unit fan based on the calculated drag coefficient; and controlling the air conditioner to perform self-cleaning when the dirt level of the outdoor unit fan reaches or exceeds a preset level.

[0005] Optionally, the drag coefficient of the outdoor unit fan is calculated based on the collected operating parameters, including: calculating the basic drag coefficient based on the collected current, power and speed of the outdoor unit fan; and calculating the corrected drag coefficient based on the calculated basic drag coefficient and the current ambient temperature.

[0006] Optionally, the foundation drag coefficient is calculated based on the collected current, power, and speed of the outdoor unit fan, including: calculating the foundation drag coefficient of the outdoor unit fan according to the following formula based on the current, power, and speed of the outdoor unit fan:

[0007]

[0008] Where C is the basic drag coefficient, 10 is the preset calculation coefficient, P0 is the preset fan reference power at the corresponding speed under the clean state of the condenser, I is the current of the outdoor unit fan, P is the power of the outdoor unit fan, and n is the speed of the outdoor unit fan.

[0009] Optionally, calculating the corrected drag coefficient based on the calculated base drag coefficient and the current ambient temperature includes: calculating the corrected drag coefficient according to the following formula based on the base drag coefficient and the current ambient temperature:

[0010] ;

[0011] in, The corrected drag coefficient is C, the base drag coefficient is k(T) 外 ) represents the temperature correction factor, determined based on the current outdoor ambient temperature, T 外 This indicates the outdoor ambient temperature. Different temperature correction factors apply when the outdoor ambient temperature falls within different temperature ranges.

[0012] Optionally, when the dirt level of the outdoor unit fan reaches a preset level or above, and the following conditions are met, the air conditioner is controlled to perform self-cleaning: the air conditioner is manually turned off, and the indoor unit heat exchanger and fan stop running; the outdoor unit of the air conditioner has no fault indication, no overload protection, and / or no voltage abnormality; and the time since the last self-cleaning is completed is greater than or equal to the preset interval.

[0013] Optionally, controlling the air conditioner to perform self-cleaning includes: controlling the air conditioner to perform self-cleaning according to preset self-cleaning execution stages, wherein the self-cleaning execution stages may specifically include: a first stage, a second stage, and a third stage, wherein: in the first stage, the outdoor unit fan is controlled to run in reverse at a first preset speed for a first preset running time; different levels of dirt clogging correspond to different first preset running times; in the second stage, the outdoor unit fan is controlled to run in forward at a second preset speed for a second preset running time; different levels of dirt clogging correspond to different second preset running times; in the third stage, the outdoor unit fan is controlled to switch speeds between a third preset speed and a fourth preset speed according to a preset switching time, and continuously run for the third preset running time; the second preset speed is greater than the first preset speed; the second preset running time is greater than the first preset running time; and the third preset speed is greater than the fourth preset speed.

[0014] Optionally, the method further includes: controlling the air conditioner to perform self-cleaning according to a preset self-cleaning execution stage, and then re-collecting the operating parameters of the outdoor unit fan; recalculating the wind resistance coefficient of the outdoor unit fan based on the re-collected operating parameters; determining whether the self-cleaning meets the standard based on the recalculated wind resistance coefficient of the outdoor unit fan; if the self-cleaning is determined to be unsatisfactory, controlling the air conditioner to perform a second self-cleaning; if the self-cleaning is determined to be satisfactory, controlling the outdoor unit to enter a standby state.

[0015] Optionally, controlling the air conditioner to perform a secondary self-cleaning includes: if the recalculated drag coefficient is greater than or equal to a first preset threshold and less than a second preset threshold, then during the secondary self-cleaning, controlling the speed of the outdoor unit fan in each cleaning stage to increase by a first preset speed increase value and extending the running time by a first preset extension time; if the recalculated drag coefficient is greater than or equal to the second preset threshold, then during the secondary self-cleaning, controlling the speed of the outdoor unit fan in each cleaning stage to increase by a second preset speed increase value and extending the running time by a second preset extension time; wherein, the first preset speed increase value is less than the second preset speed increase value; and the first preset extension time is less than the second preset extension time.

[0016] Optionally, it also includes: calculating the cleaning cycle until the next self-cleaning operation based on the current drag coefficient, wherein the cleaning cycle until the next self-cleaning operation is calculated according to the following formula based on the current drag coefficient:

[0017]

[0018] Where T represents the cleaning cycle, and T0 represents the preset baseline cycle. C represents the preset learning coefficient. 标 This represents the preset threshold for dirt and clogging, f(T) 外 () represents the ambient temperature coefficient, T 外 This indicates the outdoor ambient temperature. The temperature ambient coefficient is determined based on the outdoor ambient temperature, and different outdoor ambient temperature ranges correspond to different temperature ambient coefficients.

[0019] Optionally, it further includes: issuing corresponding prompts during self-cleaning, the prompts including at least one of: a start prompt, a process prompt, and an end prompt.

[0020] Another aspect of the present invention provides a self-cleaning control device for an air conditioner, comprising: a data acquisition unit, configured to acquire operating parameters of the outdoor unit fan of the air conditioner during operation, when a preset cleaning cycle is met; a calculation unit, configured to calculate the drag coefficient of the outdoor unit fan based on the operating parameters acquired by the data acquisition unit; a determination unit, configured to determine the dirt level of the outdoor unit fan based on the drag coefficient calculated by the calculation unit; and a control unit, configured to control the air conditioner to perform self-cleaning when the determination unit determines that the dirt level of the outdoor unit fan reaches or exceeds a preset level.

[0021] Optionally, the calculation unit calculates the drag coefficient of the outdoor unit fan based on the operating parameters collected by the acquisition unit, including: calculating the basic drag coefficient based on the collected current, power and speed of the outdoor unit fan; and calculating a corrected drag coefficient based on the calculated basic drag coefficient and the current ambient temperature.

[0022] Optionally, the calculation unit calculates the foundation drag coefficient based on the collected current, power, and speed of the outdoor unit fan, including: calculating the foundation drag coefficient of the outdoor unit fan according to the following formula based on the current, power, and speed of the outdoor unit fan:

[0023]

[0024] Where C is the basic drag coefficient, 10 is the preset calculation coefficient, P0 is the preset fan reference power at the corresponding speed under the clean state of the condenser, I is the current of the outdoor unit fan, P is the power of the outdoor unit fan, and n is the speed of the outdoor unit fan.

[0025] Optionally, the calculation unit calculates the corrected drag coefficient based on the calculated base drag coefficient and the current ambient temperature, including: calculating the corrected drag coefficient according to the following formula based on the base drag coefficient and the current ambient temperature:

[0026] ;

[0027] in, The corrected drag coefficient is C, the base drag coefficient is k(T) 外 ) represents the temperature correction factor, determined based on the current outdoor ambient temperature, T 外 This indicates the outdoor ambient temperature. Different temperature correction factors apply when the outdoor ambient temperature falls within different temperature ranges.

[0028] Optionally, when the dirt level of the outdoor unit fan reaches a preset level or above, and the following conditions are met, the control unit controls the air conditioner to perform self-cleaning: the air conditioner is manually turned off, and the indoor unit heat exchanger and fan stop running; the outdoor unit of the air conditioner has no fault indication, no overload protection, and / or no voltage abnormality; and the time since the last self-cleaning is completed is greater than or equal to the preset interval.

[0029] Optionally, the control unit controls the air conditioner to perform self-cleaning, including: controlling the air conditioner to perform self-cleaning according to preset self-cleaning execution stages, wherein the self-cleaning execution stages may specifically include: a first stage, a second stage, and a third stage, wherein: in the first stage, the outdoor unit fan is controlled to run in reverse at a first preset speed for a first preset running time; different levels of dirt clogging correspond to different first preset running times; in the second stage, the outdoor unit fan is controlled to run in forward at a second preset speed for a second preset running time; different levels of dirt clogging correspond to different second preset running times; in the third stage, the outdoor unit fan is controlled to switch speeds between a third preset speed and a fourth preset speed according to a preset switching time, and continuously run for the third preset running time; the second preset speed is greater than the first preset speed; the second preset running time is greater than the first preset running time; and the third preset speed is greater than the fourth preset speed.

[0030] Optionally, it further includes: a judgment unit; the acquisition unit is further configured to: after the control unit controls the air conditioner to perform self-cleaning according to the preset self-cleaning execution stage, re-acquire the operating parameters of the outdoor unit fan of the air conditioner; the calculation unit is further configured to: recalculate the wind resistance coefficient of the outdoor unit fan according to the operating parameters re-acquired by the acquisition unit; the judgment unit is configured to: determine whether the self-cleaning meets the standard according to the wind resistance coefficient of the outdoor unit fan recalculated by the calculation unit; the control unit is further configured to: if the judgment unit determines that the self-cleaning does not meet the standard, control the air conditioner to perform a second self-cleaning; if the self-cleaning meets the standard, control the outdoor unit to enter the standby state.

[0031] Optionally, the control unit controls the air conditioner to perform a secondary self-cleaning process, including: if the recalculated drag coefficient is greater than or equal to a first preset threshold and less than a second preset threshold, then during the secondary self-cleaning process, controlling the speed of the outdoor unit fan in each cleaning stage to increase by a first preset speed increase value and extending the running time by a first preset extension time; if the recalculated drag coefficient is greater than or equal to the second preset threshold, then during the secondary self-cleaning process, controlling the speed of the outdoor unit fan in each cleaning stage to increase by a second preset speed increase value and extending the running time by a second preset extension time; wherein, the first preset speed increase value is less than the second preset speed increase value; and the first preset extension time is less than the second preset extension time.

[0032] Optionally, it also includes: a cycle calculation unit, used to calculate the cleaning cycle until the next self-cleaning operation based on the current drag coefficient, wherein the cleaning cycle until the next self-cleaning operation is calculated according to the following formula based on the current drag coefficient:

[0033]

[0034] Where T represents the cleaning cycle, and T0 represents the preset baseline cycle. C represents the preset learning coefficient. 标 This represents the preset threshold for dirt and clogging, f(T) 外 () represents the ambient temperature coefficient, T 外 This indicates the outdoor ambient temperature. The temperature ambient coefficient is determined based on the outdoor ambient temperature, and different outdoor ambient temperature ranges correspond to different temperature ambient coefficients.

[0035] Optionally, it further includes: a prompting unit, configured to issue corresponding prompting information when the control unit performs self-cleaning, the prompting information including at least one of: a start prompt, a process prompt, and an end prompt.

[0036] In another aspect, the present invention provides a storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any of the methods described above.

[0037] In another aspect, the present invention provides an air conditioner, including a processor, a memory, and a computer program stored in the memory that can run on the processor, wherein the processor executes the program to implement the steps of any of the methods described above.

[0038] In another aspect, the present invention provides an air conditioner including any of the aforementioned self-cleaning control devices.

[0039] In another aspect, the present invention provides a computer program product, including a computer program that, when executed by a processor, implements the steps of any of the methods described above.

[0040] According to the technical solution of the present invention, the drag coefficient is calculated based on the operating parameters of the outdoor unit fan, and the dirt and blockage level of the outdoor unit fan is determined based on the drag coefficient. When the dirt and blockage level reaches or exceeds the preset level, self-cleaning is performed. This method can identify the degree of dirt and blockage of the outdoor unit fan and automatically perform self-cleaning without user operation, thus solving the problems of cumbersome self-cleaning operation and low utilization rate in related technologies.

[0041] According to the technical solution of the present invention, there is no need to add a humidity sensor, and the original structure of the outdoor unit is not modified. The function is realized by relying on the standard hardware, without any additional cost.

[0042] According to the technical solution of the present invention, a three-stage graded cleaning method is adopted, which performs reverse dust blowing, forward strong wind stripping, and pulse airflow shaking to clean the air conditioner. Compared with single reverse cleaning and low speed graded cleaning, the cleaning effect is better and has energy-saving effect. Attached Figure Description

[0043] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings:

[0044] Figure 1 This is a schematic diagram of an embodiment of the self-cleaning control method for air conditioners provided by the present invention;

[0045] Figure 2 This is a schematic diagram of another embodiment of the self-cleaning control method for air conditioners provided by the present invention;

[0046] Figure 3 This is a schematic diagram of a specific embodiment of the self-cleaning control method for air conditioners provided by the present invention;

[0047] Figure 4 This is a structural block diagram of an embodiment of the self-cleaning control device for air conditioners provided by the present invention. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0049] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0050] The main air conditioner outdoor unit cleaning technologies in related fields include: 1. Manual cleaning, which requires users to disassemble the unit themselves or hire professionals. This is cumbersome, costly, and poses safety hazards, resulting in extremely low user acceptance; 2. Frosting and defrosting self-cleaning technology, which uses the reversal of the refrigeration system to frost the outdoor unit and then defrost to wash away dust. This requires the addition of a humidity sensor and modification of the refrigeration system structure, and is prone to water leakage and freezing cracks. It cannot be used in low-temperature environments; 3. Single reverse rotation cleaning technology, which only uses the fan to reverse and blow away floating dust. This is ineffective for cleaning hardened dust and deep-seated dust, and requires manual triggering by the user, resulting in low levels of intelligence.

[0051] This invention provides a self-cleaning control method for air conditioners.

[0052] Figure 1 This is a schematic diagram of an embodiment of the self-cleaning control method for air conditioners provided by the present invention.

[0053] like Figure 1 As shown, according to an embodiment of the present invention, the self-cleaning control method of the air conditioner includes at least steps S110, S120, S130 and S140.

[0054] Step S110: During the operation of the air conditioner, when the preset cleaning cycle is met, the operating parameters of the outdoor unit fan of the air conditioner are collected.

[0055] During normal operation of the air conditioner, when the preset cleaning cycle is met, the operating parameters of the outdoor fan are collected according to the preset collection cycle. These operating parameters may specifically include the outdoor fan's current I, power P, speed n, and outdoor ambient temperature T. 外 For example, with a data collection period of 100ms, the background continuously collects the operating parameters of the outdoor fan. The data collection process has low computing power requirements, does not affect the normal operation of the air conditioner, and has no user-perceived interference.

[0056] The collected parameters and processing methods are as follows:

[0057] (1) Real-time operating current I of the fan: obtained by the outdoor unit current acquisition module, and after low-pass filtering to remove voltage fluctuation interference, the average value of 10 consecutive sets of data is taken as the effective current value;

[0058] (2) Real-time operating power P of the fan: calculated based on real-time current and voltage data, and filtered simultaneously to ensure data accuracy;

[0059] (3) Real-time operating speed n of the fan: acquired through the outdoor unit fan speed detection module, and obtained synchronously with current and power;

[0060] (4) Outdoor unit real-time ambient temperature T: The outdoor ambient temperature is collected using the original ambient temperature sensor of the outdoor unit.

[0061] Step S120: Calculate the drag coefficient of the outdoor unit fan based on the collected operating parameters of the outdoor unit fan.

[0062] In one specific implementation, the foundation drag coefficient C is first calculated based on the collected data of the outdoor unit fan's current I, power P, and speed n. Then, a corrected drag coefficient C is calculated based on the calculated foundation drag coefficient C and the current ambient temperature. 修 In one specific embodiment, the basic drag coefficient of the outdoor unit fan is calculated according to the following formula based on the current I, power P, and rotational speed n of the outdoor unit fan:

[0063]

[0064] Wherein, C is the basic drag coefficient, the value of which is positively correlated with the degree of dirt and blockage; 10 is the preset calculation coefficient; P0 is the preset fan reference power at the corresponding speed under the clean state of the condenser, which can be calibrated in advance (e.g., calibrated before leaving the factory and stored in the main control program); I is the current of the outdoor unit fan collected in real time; P is the power of the outdoor unit fan collected in real time; and n is the speed of the outdoor unit fan collected in real time.

[0065] In one specific implementation, the corrected drag coefficient C is calculated based on the baseline drag coefficient and the current ambient temperature using the following formula. 修 :

[0066] ;

[0067] in, The corrected drag coefficient is C, the base drag coefficient is k(T) 外 () is the temperature correction factor, which can be adjusted based on the outdoor ambient temperature T. 外 Segmented setting, i.e., outdoor ambient temperature T 外 The corresponding temperature correction factor k(T) varies depending on the temperature range. 外 ) are different. For example, T 外 At ≤0℃, k(T) 外 =1.05; 0℃ < T 外 At ≤35℃, k(T) 外 )=1.0;T 外 When the temperature is >35℃, k(T) 外 =0.95.

[0068] Using the above implementation method, the basic drag coefficient C is first calculated based on the collected current I, power P, and speed n of the outdoor unit fan. Then, the corrected drag coefficient C is calculated based on the current ambient temperature. 修 This allows for a more accurate and precise assessment of the drag coefficient and the degree of blockage.

[0069] Step S130: Determine the dirt and clogging level of the outdoor unit fan based on the wind resistance coefficient of the outdoor unit fan.

[0070] In one specific implementation, clogging levels can be classified according to the severity of the clogging, with a higher drag coefficient indicating more severe clogging. For example, different drag coefficient ranges correspond to different clogging levels. Based on the drag coefficient range, clogging levels can be classified as mild clogging, moderate clogging, and solid clogging, where:

[0071] (1) Drag coefficient C 修 Less than the first preset threshold indicates mild clogging, for example, C. 修 If the dust level is less than 25%, and only surface dust adheres to the condenser, cleaning can be temporarily suspended, but continuous monitoring should be performed.

[0072] (2) Drag coefficient C 修 A level of clogging is defined as being greater than or equal to the first preset threshold and less than the second preset threshold; for example, 25% ≤ C. 修 <50%, dust accumulation on the fin surface affects heat exchange efficiency, so a basic cleaning process should be initiated;

[0073] (3) Drag coefficient C 修 A value greater than or equal to the second preset threshold is considered severely clogged, for example, C. 修 ≥50% indicates deep dust accumulation and caking on the fins, severely hindering airflow. Intensive cleaning process is initiated.

[0074] Step S140: When it is determined that the dirt level of the outdoor unit fan reaches or exceeds the preset level, the air conditioner is controlled to perform self-cleaning.

[0075] In one specific implementation, when the outdoor unit fan reaches a level of moderate or above of dirt blockage, the air conditioner is controlled to perform self-cleaning.

[0076] Preferably, when the dirt level of the outdoor unit fan reaches a preset level or above, and the following conditions are met, the air conditioner is controlled to perform self-cleaning:

[0077] (1) The level of dirt and blockage reaches or exceeds the preset level;

[0078] (2) The air conditioner is manually turned off, for example, by the user. The indoor unit heat exchanger (evaporator) and fan stop running.

[0079] (3) The outdoor unit of the air conditioner has no fault indication (no fault code), no overload protection, no voltage abnormality or other safety hazards;

[0080] (4) The time since the last self-cleaning is completed is greater than or equal to the preset interval time to avoid frequent cleaning and damage to the equipment. The preset interval time is, for example, 48 hours.

[0081] Preferably, during self-cleaning, a corresponding prompt message is issued to avoid the user misunderstanding that the device is malfunctioning. The prompt message may specifically include at least one of a start prompt, a process prompt, and an end prompt. The prompt message may specifically be a text prompt and / or an audio prompt, for example,

[0082] (1) Start-up prompt: The indoor unit display screen continuously displays the code "CL" and the buzzer sounds 2 short beeps;

[0083] (2) Process prompts: The prompts remain lit throughout the process to prevent accidental operation;

[0084] (3) End prompt: The display screen switches to "00", the buzzer sounds once, and the prompt automatically turns off after 10 seconds.

[0085] In one specific embodiment, the air conditioner is controlled to perform self-cleaning according to a preset self-cleaning execution stage, which may specifically include a first stage, a second stage, and a third stage.

[0086] (1) First stage (reverse dust blowing stage): control the outdoor unit fan to reverse and run for a first preset running time at a first preset speed; the first preset speed can be a first preset percentage of the rated speed;

[0087] That is, the fan reverses at low speed, for example, at 75% of the rated speed. Different levels of clogging correspond to different first preset running times. The higher the level of clogging, the longer the first preset running time. For example, moderate clogging runs for 15 seconds, and severe clogging runs for 25 seconds, which enhances the blowing force while preventing dust from being pressed into the deep layers of the fins.

[0088] (2) Second stage (forward rotation strong wind stripping stage): control the outdoor unit fan to run forward at a second preset speed for a second preset running time; the second preset speed is greater than the first preset speed; the second preset speed can be a second preset percentage of the rated speed; the second preset percentage is greater than the first preset percentage.

[0089] That is, the fan rotates at high speed, for example, at 110% of the rated speed (not exceeding the upper limit of the safe speed of the fan), and the second preset running time is longer than the first preset running time; different levels of dirt blockage correspond to different second preset running times, and the higher the level of dirt blockage, the longer the second preset running time is. For example, moderate dirt blockage runs for 25 seconds, and severe dirt blockage runs for 40 seconds. The strong airflow efficiently removes the dust and silt that have hardened inside the fins.

[0090] (3) Third stage (pulse airflow shaking stage): The outdoor unit fan switches between the third preset speed and the fourth preset speed according to the preset switching time, and continues to run for the third preset running time. That is, the fan switches between high and low wind speeds intermittently, for example, once every 3 seconds.

[0091] The third preset speed is greater than the fourth preset speed; the third preset speed can specifically be a third preset percentage of the rated speed; the fourth preset speed can specifically be a fourth preset percentage of the rated speed; the third preset percentage is greater than the fourth preset percentage; for example, high and low wind speeds are 100% and 75% of the rated speed, respectively. Different levels of clogging correspond to different third preset operating times, with higher clogging levels corresponding to longer third preset operating times. For example, moderate clogging requires 35 seconds of operation, and severe clogging requires 55 seconds of operation, disturbing the airflow to clean residual dust from gaps and prevent secondary adhesion.

[0092] Figure 2 This is a schematic diagram of another embodiment of the self-cleaning control method for air conditioners provided by the present invention.

[0093] like Figure 2 As shown, according to another embodiment of the present invention, the self-cleaning control method of the air conditioner further includes steps S150, S160, S170 and S180.

[0094] Step S150: After the air conditioner performs self-cleaning according to the preset self-cleaning execution stage, the operating parameters of the outdoor unit fan of the air conditioner are collected again.

[0095] Step S160: Recalculate the drag coefficient of the outdoor unit fan based on the re-collected operating parameters.

[0096] Step S170: Determine whether the self-cleaning meets the standard based on the recalculated wind resistance coefficient of the outdoor unit fan.

[0097] In step S180, if it is determined that the self-cleaning has not met the standard, the air conditioner is controlled to perform a second self-cleaning; if it is determined that the self-cleaning has met the standard, the outdoor unit is controlled to enter the standby state.

[0098] Specifically, after the air conditioner performs self-cleaning according to the preset self-cleaning execution stage, the operating parameters of the outdoor unit fan are re-collected (i.e., at least one of the outdoor unit fan's current I, power P, speed n, and outdoor ambient temperature T). The drag coefficient of the outdoor unit fan is recalculated based on the re-collected operating parameters, and then the self-cleaning is judged based on the recalculated drag coefficient. Specifically, if the drag coefficient C of the outdoor unit fan is recalculated... 修If the value is less than the first preset threshold, then the self-cleaning standard is determined to be met; if the drag coefficient C of the outdoor unit fan is recalculated... 修 If the self-cleaning speed is greater than or equal to the first preset threshold, the self-cleaning function is determined to be substandard. If the self-cleaning speed is determined to be substandard, the outdoor unit is controlled to enter standby mode. If the self-cleaning speed is determined to be substandard, the air conditioner is controlled to perform a second self-cleaning.

[0099] Preferably, if the recalculated drag coefficient C 修 If the value is greater than or equal to the first preset threshold and less than the second preset threshold, then during the second self-cleaning process, the speed of the outdoor unit fan in each cleaning stage will be increased by the first preset speed increase value, and the running time will be extended by the first preset extension time; if the recalculated drag coefficient C 修 If the speed is greater than or equal to the second preset threshold, then during the second self-cleaning process, the speed of the outdoor unit fan in each cleaning stage is increased by the second preset speed increase value, and the running time is extended by the second preset extension time. The first preset speed increase value is less than the second preset speed increase value; the first preset extension time is less than the second preset extension time.

[0100] For example, based on the recalculated drag coefficient of the outdoor unit fan, the air conditioner is controlled as follows:

[0101] (1) Cleanliness meets the standard, that is, the recalculated drag coefficient C 修 Less than a first preset threshold, for example, C 修 If the value is less than 25%, record the operating data and the outdoor unit enters standby mode.

[0102] (2) Cleanliness not up to standard: i.e., the recalculated drag coefficient C 修 Greater than or equal to the first preset threshold and less than the second preset threshold, for example, 25% ≤ C 修 If the load is less than 50%, a secondary basic cleaning will be automatically initiated, with the rotation speed increased by 10% and the cleaning time extended by 20% in each stage.

[0103] (3) Seriously below standard: i.e., the recalculated drag coefficient C 修 Greater than or equal to the second preset threshold, for example, C 修 If the target level is ≥50%, a second enhanced cleaning cycle will automatically initiate, increasing the rotation speed by 15% and extending the cleaning time by 30% in each stage. If the target level is still not met, the cleaning cycle will be initiated first after the machine is shut down next time. If the target level is still not met after the second cleaning cycle, a second cleaning cycle can only be performed after 48 hours.

[0104] Optionally, the method further includes: calculating the cleaning cycle until the next self-cleaning operation based on the current drag coefficient.

[0105] In one specific implementation, the cleaning cycle T until the next self-cleaning is performed is calculated based on the current drag coefficient using the following formula:

[0106]

[0107] Where T represents the cleaning cycle; T0 represents the preset baseline cycle, for example, 168 hours; γ represents the preset learning coefficient, for example, 0.15; C 标 This represents a preset threshold for dirt and clogging, preferably the first preset threshold, for example, 25%; f(T) 外 () represents the temperature environment coefficient.

[0108] The temperature environment coefficient f(T) 外 According to the outdoor ambient temperature T 外 Confirmed. Different outdoor ambient temperature ranges correspond to different temperature environmental coefficients. Specifically, when the outdoor ambient temperature is greater than a first preset temperature value, the temperature environmental coefficient is the first preset coefficient; when the outdoor ambient temperature is greater than a second preset temperature value but less than or equal to the first preset temperature value, the temperature environmental coefficient is the second preset coefficient; when the outdoor ambient temperature is less than or equal to the second preset temperature value, the temperature environmental coefficient is the third preset coefficient. The first preset coefficient is less than the second preset coefficient by a specified amount; the second preset coefficient is less than the third preset coefficient.

[0109] For example, the first preset temperature value is 35℃, the second preset temperature value is 0℃; the first preset coefficient is 0.9, the second preset coefficient is 1.0, and the third preset coefficient is 1.1, then...

[0110] (1) High temperature and dusty environment (T 外 >35℃): f(T 外 )=0.9, automatically shortening the cycle;

[0111] (2) Clean environment at normal temperature (0℃ < T) 外 ≤35℃): f(T 外 )=1.0, maintaining the baseline period;

[0112] (3) Low-temperature and low-dust scenarios (T 外 ≤0℃): f(T 外 =1.1, automatically extend the cycle.

[0113] The adjusted cleaning cycle T needs to be within the preset maximum cleaning time. For example, to avoid frequent cleaning or long periods without cleaning, the shortest time is 48 hours and the longest time is 336 hours.

[0114] To clearly illustrate the technical solution of the present invention, the execution flow of the self-cleaning control method for air conditioners provided by the present invention will be described below with a specific example.

[0115] Figure 3This is a schematic diagram of a specific embodiment of the self-cleaning control method for air conditioners provided by the present invention. Figure 3 As shown, when the air conditioner is operating normally (cooling, heating, or blowing air), parameters are collected at preset intervals (e.g., 100ms), including current I, power P, speed, and ambient temperature. After the data is filtered, the effective parameter values ​​are calculated and substituted into the formula to calculate the basic drag coefficient C, and then the corrected drag coefficient C is calculated. 修 The level of clogging is determined based on the corrected drag coefficient. If it is mild clogging (e.g., C...), then... 修 <25%), do not start cleaning; if it is moderate or above (e.g., C) 修 To determine if the self-cleaning conditions are met (≥25%), the following criteria must be met: 1. Automatic shutdown; 2. No faults; 3. Time since last cleaning ≥48 hours. If the self-cleaning conditions are met, the indoor unit will indicate that the outdoor unit is cleaning and initiate a three-stage graded cleaning process. After cleaning is completed, parameters will be collected again and the wind resistance coefficient will be calculated to determine if the cleaning meets the standards. If it meets the standards (e.g., C...), the self-cleaning process will be completed. 修 If the percentage is less than 25%, the indoor unit will indicate that cleaning is complete; if it does not meet the standard, a second self-cleaning process will be performed. If the percentage is moderately below the standard (e.g., 25% ≤ C), the indoor unit will indicate that cleaning is complete. 修 If the percentage is less than 50%, initiate a second basic cleaning (e.g., increase engine speed by 10% and runtime by 20%). If the cleaning is not severely substandard (e.g., C...), proceed with the cleaning. 修 If the percentage is ≥50%, then a second enhanced cleaning process will be initiated (e.g., rotation speed +15%, runtime +30%).

[0116] The execution flow of this invention will be described below with a specific example:

[0117] I. Implementation Scenarios

[0118] The air conditioner is a 1.5 HP wall-mounted outdoor unit with a rated fan speed of 850 rpm and a base power of P0=60W. It is installed in a hot and dusty environment in summer (average daily temperature of 32℃). The air conditioner runs for an average of 10 hours a day and is adapted to the technical solution of this invention to achieve self-cleaning when shutting down.

[0119] II. Implementation Process

[0120] 1. Clog Identification Stage: During normal cooling operation of the air conditioner, parameters are collected at 100ms intervals. After processing, the effective current I=0.335A, operating power P=68W, real-time speed n=840rpm, and ambient temperature T=32℃ are obtained. The basic drag coefficient is calculated using the formula: C=10×(68-60) / (0.33×840)×100%=28.9%; since 0℃<T 外 When the temperature is ≤35℃, the temperature correction factor k(T) 外 =1, corrected drag coefficient C 修=28.9%×1=28.9%, which is judged as moderate blockage.

[0121] 2. Cleaning Trigger Phase: When the user turns off the air conditioner, the system detects that the following four conditions are met: "moderate dirt and blockage, active shutdown, no fault in the outdoor unit, and 72 hours since the last cleaning". The system immediately triggers the self-cleaning process, the indoor unit display shows "CL" and the buzzer sounds twice.

[0122] 3. Tiered Cleaning Stage: Perform three-stage cleaning based on moderate dirt and clogging parameters:

[0123] (1) Reverse dust blowing: The fan reverses speed to 638 rpm (75% of the rated speed) and runs for 15 seconds to enhance the blowing force to remove surface catkins, floating dust and some attached dust;

[0124] (2) Forward rotation strong wind stripping: The fan rotates at a forward speed of 935 rpm (rated speed 110%), and runs for 25 seconds. The strong airflow efficiently strips away the dust accumulated on the surface of the fins and the lightly caking dust.

[0125] (3) Pulse airflow shaking: The fan switches between high and low speeds every 3 seconds at 638 rpm (75% of the rated speed) and 935 rpm (110% of the rated speed) for 35 seconds to shake off residual dust in the gaps and avoid secondary adhesion.

[0126] 4. Effectiveness Verification Phase: After cleaning, the system collects parameters again: I=0.297A, P=62W, n=840rpm, and calculates C=10×(62-60) / (0.297×840)×100%=8.0%. 修 =8.0%×1=8.0%, which is considered to meet the cleaning standard. The indoor unit displays "00" and the buzzer sounds once.

[0127] 5. Cycle Optimization Phase: Calculate the next cycle based on the cleaning data: T = 168 × (1 - 0.15) × 25% ÷ 8% × 1 = 446 hours (Note: C) 标 (Corresponding to a moderate dirt and clogging baseline coefficient of 25%) Since 446 hours is longer than the maximum cleaning cycle time of 336 hours, the system automatically sets the next cleaning trigger cycle to 336 hours.

[0128] By adopting the technical solution of this invention, the heat exchange efficiency of the air conditioner outdoor unit is improved and the cooling energy consumption is reduced after cleaning; the entire cleaning process requires no user operation, is short in time, and does not affect subsequent use; the optimized speed parameters ensure the cleaning effect while not exceeding the safe operating range of the fan, and the equipment operation stability is significantly improved.

[0129] The present invention also provides a self-cleaning control device for an air conditioner.

[0130] Figure 4This is a structural block diagram of an embodiment of the self-cleaning control device for air conditioners provided by the present invention. Figure 4 As shown, the self-cleaning control device 100 of the air conditioner includes: a data acquisition unit 110, a calculation unit 120, a determination unit 130, and a control unit 140.

[0131] The data acquisition unit 110 is used to acquire the operating parameters of the outdoor unit fan of the air conditioner when a preset cleaning cycle is met during the operation of the air conditioner.

[0132] During normal operation of the air conditioner, when the preset cleaning cycle is met, the operating parameters of the outdoor fan are collected according to the preset collection cycle. These operating parameters may specifically include the outdoor fan's current I, power P, speed n, and outdoor ambient temperature T. 外 For example, with a data collection period of 100ms, the background continuously collects the operating parameters of the outdoor fan. The data collection process has low computing power requirements, does not affect the normal operation of the air conditioner, and has no user-perceived interference.

[0133] The collected parameters and processing methods are as follows:

[0134] (1) Real-time operating current I of the fan: obtained by the outdoor unit current acquisition module, and after low-pass filtering to remove voltage fluctuation interference, the average value of 10 consecutive sets of data is taken as the effective current value;

[0135] (2) Real-time operating power P of the fan: calculated based on real-time current and voltage data, and filtered simultaneously to ensure data accuracy;

[0136] (3) Real-time operating speed n of the fan: acquired through the outdoor unit fan speed detection module, and obtained synchronously with current and power;

[0137] (4) Outdoor unit real-time ambient temperature T: The outdoor ambient temperature is collected using the original ambient temperature sensor of the outdoor unit.

[0138] The calculation unit 120 is used to calculate the drag coefficient of the outdoor unit fan based on the operating parameters of the outdoor unit fan collected by the acquisition unit.

[0139] In one specific implementation, the foundation drag coefficient C is first calculated based on the collected data of the outdoor unit fan's current I, power P, and speed n. Then, a corrected drag coefficient C is calculated based on the calculated foundation drag coefficient C and the current ambient temperature. 修 In one specific embodiment, the basic drag coefficient of the outdoor unit fan is calculated according to the following formula based on the current I, power P, and rotational speed n of the outdoor unit fan:

[0140]

[0141] Wherein, C is the basic drag coefficient, the value of which is positively correlated with the degree of dirt and blockage; 10 is the preset calculation coefficient; P0 is the preset fan reference power at the corresponding speed under the clean state of the condenser, which can be calibrated in advance (e.g., calibrated before leaving the factory and stored in the main control program); I is the current of the outdoor unit fan collected in real time; P is the power of the outdoor unit fan collected in real time; and n is the speed of the outdoor unit fan collected in real time.

[0142] In one specific implementation, the corrected drag coefficient C is calculated based on the baseline drag coefficient and the current ambient temperature using the following formula. 修 :

[0143] ;

[0144] in, The corrected drag coefficient is C, the base drag coefficient is k(T) 外 () is the temperature correction factor, which can be adjusted based on the outdoor ambient temperature T. 外 Segmented setting, i.e., outdoor ambient temperature T 外 The corresponding temperature correction factor k(T) varies depending on the temperature range. 外 ) are different. For example, T 外 At ≤0℃, k(T) 外 =1.05; 0℃ < T 外 At ≤35℃, k(T) 外 )=1.0;T 外 When the temperature is >35℃, k(T) 外 =0.95.

[0145] The determining unit 130 is used to determine the dirt and clogging level of the outdoor unit fan based on the wind resistance coefficient of the outdoor unit fan calculated by the calculation unit.

[0146] In one specific implementation, clogging levels can be classified according to the severity of the clogging, with a higher drag coefficient indicating more severe clogging. For example, different drag coefficient ranges correspond to different clogging levels. Based on the drag coefficient range, clogging levels can be classified as mild clogging, moderate clogging, and solid clogging, where:

[0147] (1) Drag coefficient C 修 Less than the first preset threshold indicates mild clogging, for example, C. 修 If the dust level is less than 25%, and only surface dust adheres to the condenser, cleaning can be temporarily suspended, but continuous monitoring should be performed.

[0148] (2) Drag coefficient C 修 A level of clogging is defined as being greater than or equal to the first preset threshold and less than the second preset threshold; for example, 25% ≤ C. 修<50%, dust accumulation on the fin surface affects heat exchange efficiency, so a basic cleaning process should be initiated;

[0149] (3) Drag coefficient C 修 A value greater than or equal to the second preset threshold is considered severely clogged, for example, C. 修 ≥50% indicates deep dust accumulation and caking on the fins, severely hindering airflow. Intensive cleaning process is initiated.

[0150] The control unit 140 is used to control the air conditioner to perform self-cleaning when the determining unit determines that the dirt level of the outdoor unit fan reaches or exceeds a preset level.

[0151] In one specific implementation, when the outdoor unit fan reaches a level of moderate or above of dirt blockage, the air conditioner is controlled to perform self-cleaning.

[0152] Preferably, when the dirt level of the outdoor unit fan reaches a preset level or above, and the following conditions are met, the air conditioner is controlled to perform self-cleaning:

[0153] (1) The level of dirt and blockage reaches or exceeds the preset level;

[0154] (2) The air conditioner is manually turned off, for example, by the user. The indoor unit heat exchanger (evaporator) and fan stop running.

[0155] (3) The outdoor unit of the air conditioner has no fault indication (no fault code), no overload protection, no voltage abnormality or other safety hazards;

[0156] (4) The time since the last self-cleaning is completed is greater than or equal to the preset interval time to avoid frequent cleaning and damage to the equipment. The preset interval time is, for example, 48 hours.

[0157] Preferably, the device 100 further includes: a prompting unit (not shown), configured to issue corresponding prompting information when the control unit performs self-cleaning, the prompting information specifically including at least one of: a start prompt, a process prompt, and an end prompt. The prompting information may specifically be a text prompt and / or an audio prompt, for example...

[0158] (1) Start-up prompt: The indoor unit display screen continuously displays the code "CL" and the buzzer sounds 2 short beeps;

[0159] (2) Process prompts: The prompts remain lit throughout the process to prevent accidental operation;

[0160] (3) End prompt: The display screen switches to "00", the buzzer sounds once, and the prompt automatically turns off after 10 seconds.

[0161] In one specific embodiment, the air conditioner is controlled to perform self-cleaning according to a preset self-cleaning execution stage, which may specifically include a first stage, a second stage, and a third stage.

[0162] (1) First stage (reverse dust blowing stage): control the outdoor unit fan to reverse and run for a first preset running time at a first preset speed; the first preset speed can be a first preset percentage of the rated speed;

[0163] That is, the fan reverses at low speed, for example, at 75% of the rated speed. Different levels of clogging correspond to different first preset running times. The higher the level of clogging, the longer the first preset running time. For example, moderate clogging runs for 15 seconds, and severe clogging runs for 25 seconds, which enhances the blowing force while preventing dust from being pressed into the deep layers of the fins.

[0164] (2) Second stage (forward rotation strong wind stripping stage): control the outdoor unit fan to run forward at a second preset speed for a second preset running time; the second preset speed is greater than the first preset speed; the second preset speed can be a second preset percentage of the rated speed; the second preset percentage is greater than the first preset percentage.

[0165] That is, the fan rotates at high speed, for example, at 110% of the rated speed (not exceeding the upper limit of the safe speed of the fan), and the second preset running time is longer than the first preset running time; different levels of dirt blockage correspond to different second preset running times, and the higher the level of dirt blockage, the longer the second preset running time is. For example, moderate dirt blockage runs for 25 seconds, and severe dirt blockage runs for 40 seconds. The strong airflow efficiently removes the dust and silt that have hardened inside the fins.

[0166] (3) Third stage (pulse airflow shaking stage): The outdoor unit fan switches between the third preset speed and the fourth preset speed according to the preset switching time, and continues to run for the third preset running time. That is, the fan switches between high and low wind speeds intermittently, for example, once every 3 seconds.

[0167] The third preset speed is greater than the fourth preset speed; the third preset speed can specifically be a third preset percentage of the rated speed; the fourth preset speed can specifically be a fourth preset percentage of the rated speed; the third preset percentage is greater than the fourth preset percentage; for example, high and low wind speeds are 100% and 75% of the rated speed, respectively. Different levels of clogging correspond to different third preset operating times, with higher clogging levels corresponding to longer third preset operating times. For example, moderate clogging requires 35 seconds of operation, and severe clogging requires 55 seconds of operation, disturbing the airflow to clean residual dust from gaps and prevent secondary adhesion.

[0168] Optionally, the device 100 further includes: a judgment unit (not shown); the acquisition unit 110 is further configured to: after the control unit 140 controls the air conditioner to perform self-cleaning according to the preset self-cleaning execution stage, re-acquire the operating parameters of the outdoor unit fan of the air conditioner; the calculation unit 120 is further configured to: recalculate the wind resistance coefficient of the outdoor unit fan according to the operating parameters re-acquired by the acquisition unit 110; the judgment unit 130 is configured to: determine whether the self-cleaning meets the standard according to the wind resistance coefficient of the outdoor unit fan recalculated by the calculation unit; the control unit 140 is further configured to: if the judgment unit determines that the self-cleaning does not meet the standard, control the air conditioner to perform a second self-cleaning; if the self-cleaning meets the standard, control the outdoor unit to enter the standby state.

[0169] Specifically, after the air conditioner performs self-cleaning according to the preset self-cleaning execution stage, the operating parameters of the outdoor unit fan are re-collected (i.e., at least one of the outdoor unit fan's current I, power P, speed n, and outdoor ambient temperature T). The drag coefficient of the outdoor unit fan is recalculated based on the re-collected operating parameters, and then the self-cleaning is judged based on the recalculated drag coefficient. Specifically, if the drag coefficient C of the outdoor unit fan is recalculated... 修 If the value is less than the first preset threshold, then the self-cleaning standard is determined to be met; if the drag coefficient C of the outdoor unit fan is recalculated... 修 If the self-cleaning speed is greater than or equal to the first preset threshold, the self-cleaning function is determined to be substandard. If the self-cleaning speed is determined to be substandard, the outdoor unit is controlled to enter standby mode. If the self-cleaning speed is determined to be substandard, the air conditioner is controlled to perform a second self-cleaning.

[0170] Preferably, if the recalculated drag coefficient C 修 If the value is greater than or equal to the first preset threshold and less than the second preset threshold, then during the second self-cleaning process, the speed of the outdoor unit fan in each cleaning stage will be increased by the first preset speed increase value, and the running time will be extended by the first preset extension time; if the recalculated drag coefficient C 修 If the speed is greater than or equal to the second preset threshold, then during the second self-cleaning process, the speed of the outdoor unit fan in each cleaning stage is increased by the second preset speed increase value, and the running time is extended by the second preset extension time. The first preset speed increase value is less than the second preset speed increase value; the first preset extension time is less than the second preset extension time.

[0171] For example, based on the recalculated drag coefficient of the outdoor unit fan, the air conditioner is controlled as follows:

[0172] (1) Cleanliness meets the standard, that is, the recalculated drag coefficient C 修 Less than a first preset threshold, for example, C 修If the value is less than 25%, record the operating data and the outdoor unit enters standby mode.

[0173] (2) Cleanliness not up to standard: i.e., the recalculated drag coefficient C 修 Greater than or equal to the first preset threshold and less than the second preset threshold, for example, 25% ≤ C 修 If the load is less than 50%, a secondary basic cleaning will be automatically initiated, with the rotation speed increased by 10% and the cleaning time extended by 20% in each stage.

[0174] (3) Seriously below standard: i.e., the recalculated drag coefficient C 修 Greater than or equal to the second preset threshold, for example, C 修 If the target level is ≥50%, a second enhanced cleaning cycle will automatically initiate, increasing the rotation speed by 15% and extending the cleaning time by 30% in each stage. If the target level is still not met, the cleaning cycle will be initiated first after the machine is shut down next time. If the target level is still not met after the second cleaning cycle, a second cleaning cycle can only be performed after 48 hours.

[0175] Optionally, the device 100 further includes a cycle calculation unit (not shown) for calculating the cleaning cycle until the next self-cleaning operation based on the current drag coefficient.

[0176] In one specific implementation, the cleaning cycle T until the next self-cleaning is performed is calculated based on the current drag coefficient using the following formula:

[0177]

[0178] Where T represents the cleaning cycle; T0 represents the preset baseline cycle, for example, 168 hours; This indicates the preset learning coefficient, for example, 0.15; C 标 This represents a preset threshold for dirt and clogging, preferably the first preset threshold, for example, 25%; f(T) 外 () represents the temperature environment coefficient.

[0179] The temperature environment coefficient f(T) 外 According to the outdoor ambient temperature T 外 Confirmed. Different outdoor ambient temperature ranges correspond to different temperature environmental coefficients. Specifically, when the outdoor ambient temperature is greater than a first preset temperature value, the temperature environmental coefficient is the first preset coefficient; when the outdoor ambient temperature is greater than a second preset temperature value but less than or equal to the first preset temperature value, the temperature environmental coefficient is the second preset coefficient; when the outdoor ambient temperature is less than or equal to the second preset temperature value, the temperature environmental coefficient is the third preset coefficient. The first preset coefficient is less than the second preset coefficient by a specified amount; the second preset coefficient is less than the third preset coefficient.

[0180] For example, the first preset temperature value is 35℃, the second preset temperature value is 0℃; the first preset coefficient is 0.9, the second preset coefficient is 1.0, and the third preset coefficient is 1.1, then...

[0181] (1) High temperature and dusty environment (T 外 >35℃): f(T 外 )=0.9, automatically shortening the cycle;

[0182] (2) Clean environment at normal temperature (0℃ < T) 外 ≤35℃): f(T 外 )=1.0, maintaining the baseline period;

[0183] (3) Low-temperature and low-dust scenarios (T 外 ≤0℃): f(T 外 =1.1, automatically extend the cycle.

[0184] The adjusted cleaning cycle T needs to be within the preset maximum cleaning time. For example, to avoid frequent cleaning or long periods without cleaning, the shortest time is 48 hours and the longest time is 336 hours.

[0185] The present invention also provides a storage medium corresponding to the self-cleaning control method of the air conditioner, wherein a computer program is stored thereon, and when the program is executed by a processor, it implements the steps of any of the aforementioned methods.

[0186] The present invention also provides an air conditioner corresponding to the self-cleaning control method of the air conditioner, comprising a processor, a memory, and a computer program stored in the memory that can run on the processor, wherein the processor executes the program to implement the steps of any of the aforementioned methods.

[0187] The present invention also provides an air conditioner corresponding to the self-cleaning control device of the air conditioner, including the self-cleaning control device of any of the aforementioned air conditioners.

[0188] The present invention also provides a computer program product corresponding to the self-cleaning control method of the air conditioner, comprising a computer program that, when executed by a processor, implements the steps of any of the aforementioned methods.

[0189] Accordingly, the solution provided by the present invention calculates the drag coefficient based on the operating parameters of the outdoor unit fan, thereby determining the degree of dirt and clogging of the outdoor unit fan based on the drag coefficient, and performs self-cleaning when the degree of dirt and clogging reaches or exceeds a preset level. It can accurately identify the degree of dirt and clogging of the outdoor unit fan and automatically perform self-cleaning without user operation, thus solving the problems of cumbersome self-cleaning operation and low utilization rate in related technologies. Since it can accurately identify whether self-cleaning is needed and avoid ineffective cleaning, it also has an energy-saving effect.

[0190] According to the technical solution of the present invention, there is no need to add a humidity sensor, and the original structure of the outdoor unit is not modified. The function is realized by relying on the standard hardware, without any additional cost.

[0191] According to the technical solution of the present invention, a three-stage graded cleaning method is adopted, which performs reverse dust blowing, forward strong wind stripping, and pulse airflow shaking to clean the air conditioner. Compared with single reverse cleaning and low speed graded cleaning, the cleaning effect is better and has energy-saving effect.

[0192] According to the technical solution of the present invention, there is no need to deal with frosting and defrosting or reversing of the refrigeration system, there is no risk of water leakage, freezing cracks or malfunctions, the control logic is simple and the equipment has high stability.

[0193] According to the technical solution of the present invention, cleaning is performed after the machine is turned off, without occupying usage time, and status prompts are provided throughout the process to avoid user misunderstanding.

[0194] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and embodiments are within the scope and spirit of this invention and the appended claims. For example, due to the nature of software, the functions described above can be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Furthermore, the functional units can be integrated into a single processing unit, or each unit can exist physically separately, or two or more units can be integrated into a single unit.

[0195] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0196] The units described as separate components may or may not be physically separate. Similarly, the components of the control device may or may not be physical units; they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0197] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to related technologies, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0198] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A self-cleaning control method for an air conditioner, characterized in that, include: During the operation of the air conditioner, when the preset cleaning cycle is met, the operating parameters of the outdoor unit fan of the air conditioner are collected; Based on the collected operating parameters of the outdoor unit fan, the drag coefficient of the outdoor unit fan is calculated. The degree of dirt and clogging of the outdoor unit fan is determined based on the calculated drag coefficient of the outdoor unit fan. When it is determined that the dirt level of the outdoor unit fan reaches or exceeds the preset level, the air conditioner is controlled to perform self-cleaning.

2. The method according to claim 1, characterized in that, Based on the collected operating parameters, the drag coefficient of the outdoor unit fan is calculated, including: The foundation drag coefficient is calculated based on the collected current, power, and speed of the outdoor unit fan. The corrected drag coefficient is calculated based on the calculated base drag coefficient and the current ambient temperature.

3. The method according to claim 2, characterized in that, The foundation drag coefficient is calculated based on the collected current, power, and speed of the outdoor unit fan, including: Based on the current, power, and speed of the outdoor unit fan, the basic drag coefficient of the outdoor unit fan is calculated according to the following formula: Where C is the basic drag coefficient, 10 is the preset calculation coefficient, P0 is the preset fan reference power at the corresponding speed under the clean state of the condenser, I is the current of the outdoor unit fan, P is the power of the outdoor unit fan, and n is the speed of the outdoor unit fan.

4. The method according to claim 2, characterized in that, The corrected drag coefficient is calculated based on the calculated base drag coefficient and the current ambient temperature, including: Based on the baseline drag coefficient and the current ambient temperature, the corrected drag coefficient is calculated using the following formula: ； in, The corrected drag coefficient is C, the base drag coefficient is k(T) 外 ) represents the temperature correction factor, determined based on the current outdoor ambient temperature, T 外 This indicates the outdoor ambient temperature. Different temperature correction factors apply when the outdoor ambient temperature falls within different temperature ranges.

5. The method according to any one of claims 1-4, characterized in that, When the outdoor unit fan reaches a preset level of dirt clogging or above, and the following conditions are met, the air conditioner will be controlled to perform self-cleaning: The air conditioner was manually turned off, and the indoor unit's heat exchanger and fan stopped running; The outdoor unit of the air conditioner has no fault indication, no overload protection and / or no voltage abnormality; The time since the last self-cleaning was completed is greater than or equal to the preset interval.

6. The method according to any one of claims 1-4, characterized in that, Controlling the air conditioner to perform self-cleaning includes: controlling the air conditioner to perform self-cleaning according to preset self-cleaning execution stages, wherein the self-cleaning execution stages may specifically include: a first stage, a second stage, and a third stage, wherein: In the first stage, the outdoor unit fan is controlled to reverse and run at a first preset speed for a first preset running time; different levels of dirt and blockage correspond to different first preset running times. In the second stage, the outdoor unit fan is controlled to rotate forward at a second preset speed for a second preset running time; different levels of dirt and blockage correspond to different second preset running times. In the third stage, the outdoor unit fan is controlled to switch between a third preset speed and a fourth preset speed according to a preset switching time, and continues to run for a third preset running time. The second preset speed is greater than the first preset speed; the second preset running time is greater than the first preset running time; the third preset speed is greater than the fourth preset speed.

7. The method according to any one of claims 1-4, characterized in that, Also includes: After the air conditioner performs self-cleaning according to the preset self-cleaning execution stage, the operating parameters of the outdoor unit fan of the air conditioner are collected again. The drag coefficient of the outdoor unit fan is recalculated based on the re-collected operating parameters. Determine whether the self-cleaning function meets the standard based on the recalculated drag coefficient of the outdoor unit fan; If the self-cleaning is deemed insufficient, the air conditioner is controlled to perform a second self-cleaning; if the self-cleaning is deemed sufficient, the outdoor unit is controlled to enter standby mode.

8. The method according to claim 7, characterized in that, Controlling the air conditioner to perform a secondary self-cleaning includes: If the recalculated drag coefficient is greater than or equal to the first preset threshold and less than the second preset threshold, then when performing the second self-cleaning, the speed of the outdoor unit fan in each cleaning stage is increased by the first preset speed increase value, and the running time is extended by the first preset extension time. If the recalculated drag coefficient is greater than or equal to the second preset threshold, then during the second self-cleaning, the speed of the outdoor unit fan in each cleaning stage is increased by the second preset speed increase value, and the running time is extended by the second preset extension time. Wherein, the first preset speed increase value is less than the second preset speed increase value; the first preset extension time is less than the second preset extension time.

9. The method according to any one of claims 1-4, characterized in that, Also includes: The cleaning cycle until the next self-cleaning cycle is calculated based on the current drag coefficient, using the following formula: Where T represents the cleaning cycle, and T0 represents the preset baseline cycle. C represents the preset learning coefficient. 标 This represents the preset threshold for dirt and clogging, f(T) 外 () represents the ambient temperature coefficient, T 外 This indicates the outdoor ambient temperature. The temperature ambient coefficient is determined based on the outdoor ambient temperature, and different outdoor ambient temperature ranges correspond to different temperature ambient coefficients.

10. The method according to any one of claims 1-4, characterized in that, Also includes: When performing self-cleaning, a corresponding prompt message is issued, including at least one of the following: a start prompt, a process prompt, and an end prompt.

11. A self-cleaning control device for an air conditioner, characterized in that, include: The data acquisition unit is used to acquire the operating parameters of the outdoor unit fan of the air conditioner when the preset cleaning cycle is met during the operation of the air conditioner; The calculation unit is used to calculate the drag coefficient of the outdoor unit fan based on the operating parameters of the outdoor unit fan collected by the acquisition unit. The determining unit is used to determine the dirt and clogging level of the outdoor unit fan based on the drag coefficient of the outdoor unit fan calculated by the calculation unit. The control unit is used to control the air conditioner to perform self-cleaning when the determining unit determines that the dirt level of the outdoor unit fan reaches or exceeds a preset level.

12. A storage medium, characterized in that, It stores a computer program that, when executed by a processor, implements the steps of the method according to any one of claims 1-10.

13. An air conditioner, characterized in that, It includes a processor, a memory, and a computer program stored in the memory that can run on the processor, wherein the processor executes the program to implement the steps of the method of any one of claims 1-10, or includes the self-cleaning control device as described in claim 11.

14. A computer program product, characterized in that, Includes a computer program, which, when executed by a processor, implements the steps of the method according to any one of claims 1-10.

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