A cleaning control method of an air conditioner and the air conditioner

Abstract

The application provides a cleaning control method of an air conditioner and the air conditioner. The method comprises the following steps: obtaining the air flow temperature difference on both sides of the refrigerant inlet of a heat exchanger, which is recorded as a first temperature difference, and the air flow temperature difference on both sides of the refrigerant outlet of the heat exchanger, which is recorded as a second temperature difference; determining the heat exchange amount of the heat exchanger within a first preset working time according to the first temperature difference and the second temperature difference; and determining whether the heat exchanger needs to be cleaned according to the heat exchange amount. The scheme of the application realizes accurate judgment of the cleaning time of the heat exchanger.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to a cleaning control method for an air conditioner and an air conditioner. Background Technology

[0002] During long-term operation, dust, lint, and other contaminants easily accumulate on the surface of the fins of the core heat exchanger in air conditioners. This dirt adheres to the spaces between the fins and the surface of the heat exchange tubes, creating additional thermal resistance and severely hindering heat exchange between the air and the refrigerant. This leads to decreased heat exchange efficiency, reduced cooling / heating capacity, increased energy consumption, and potentially increased operating noise. Long-term operation can also affect the lifespan of the equipment and may promote bacterial growth, impacting air quality. Current air conditioner cleaning controls mostly use timed cleaning modes, which cannot match the actual dirt and blockage status of the heat exchanger, making it difficult to accurately control the cleaning timing and easily resulting in over-cleaning or untimely cleaning. Summary of the Invention

[0003] In view of the above problems, the present invention is proposed to provide a cleaning control method and air conditioner for an air conditioner that overcomes or at least partially solves the above problems, at least to solve the technical problem of inaccurate judgment of the cleaning timing of heat exchangers in the prior art.

[0004] According to one aspect of the present invention, a cleaning control method for an air conditioner is provided, comprising: The airflow temperature difference on both sides of the refrigerant inlet of the heat exchanger is recorded as the first temperature difference, and the airflow temperature difference on both sides of the refrigerant outlet of the heat exchanger is recorded as the second temperature difference. The heat exchanger's heat exchange capacity within a first preset operating time is determined based on the first temperature difference and the second temperature difference. The need for cleaning of the heat exchanger is determined based on the amount of heat exchanged.

[0005] Optionally, before obtaining the first temperature difference and the second temperature difference, the method further includes: The temperature difference between the two sides of the heat exchanger is obtained and recorded as the third temperature difference; Determine whether the third temperature difference meets the preset conditions; If so, the temperature difference between the airflow on both sides of the refrigerant inlet of the heat exchanger and the temperature difference between the airflow on both sides of the refrigerant outlet of the heat exchanger are obtained.

[0006] Optionally, the preset condition is that the third temperature difference gradually decreases and the third temperature difference changes linearly.

[0007] Optionally, determining the heat exchange capacity of the heat exchanger within a first preset operating time based on the first temperature difference and the second temperature difference includes: The average temperature difference is determined based on the first temperature difference and the second temperature difference; the average temperature difference is half the sum of the first temperature difference and the second temperature difference. Obtain the heat transfer coefficient and heat transfer area of ​​the heat exchanger; The heat exchanger's heat exchange capacity within the first preset operating time is determined based on the heat transfer coefficient, heat exchange area, and average temperature difference within the first preset operating time.

[0008] Optionally, determining whether the heat exchanger needs cleaning based on the amount of heat exchange includes: Obtain the difference between the heat exchange and the reference heat exchange; If the difference is greater than or equal to a first threshold, it is determined that the heat exchanger needs to be cleaned.

[0009] Optionally, the air conditioner cleaning control method further includes: Obtain the operating parameters of the air conditioner; The operating parameters are input into a pre-trained reference heat exchanger model that characterizes the heat exchanger in a clean state to obtain the reference heat exchanger.

[0010] Optionally, the air conditioner cleaning control method further includes: After cleaning the heat exchanger, the operating parameters of the air conditioner are recorded within one or more consecutive second preset time periods; the operating parameters include the operating frequency of the compressor, and the ambient temperature and / or ambient humidity of the space where the heat exchanger is located; the second preset time period is equal to the first preset time period; The heat exchanger's heat exchange capacity during the second preset operating time is calculated based on the operating parameters. Determine whether the difference between the heat exchanger's heat exchange capacity within a second preset operating time and the reference heat exchange capacity is greater than or equal to a second threshold. If so, if it is determined that the heat exchanger has not been completely cleaned, the first threshold is reduced, and it is determined that the heat exchanger needs to be cleaned or a heat exchanger clogging warning is issued. If not, the recorded operating parameters are used as sample data for the reference heat exchanger model, and the reference heat exchanger model is trained or updated based on the sample data and the heat exchanger heat exchanged within the second preset operating time calculated based on the sample data.

[0011] Optionally, the air conditioner cleaning control method further includes: Obtain parameters of the fouling risk factor of the space where the heat exchanger is located; When the parameter of the fouling risk factor is greater than or equal to the threshold, the cumulative operating time of the heat exchanger is accumulated; The first threshold is reduced based on the cumulative working time.

[0012] Optionally, the dirt risk factor is one, and reducing the first threshold based on the cumulative working time includes: When the cumulative working time is greater than or equal to the time threshold, decrease the first threshold; or, The dirt and grime risk factors are multiple, and the step of reducing the first threshold based on the cumulative working time includes: Determine whether the overlapping working time of any two of the multiple cumulative working times is greater than the overlap threshold; If so, decrease the first threshold; If not, when any of the cumulative working hours is greater than or equal to the corresponding duration threshold, the first threshold is reduced.

[0013] Optionally, the air conditioner cleaning control method is characterized by further comprising: If the heat exchanger needs cleaning, determine whether a shutdown signal has been received; If so, clean the heat exchanger.

[0014] According to another aspect of the present invention, an air conditioner is also provided, which includes a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of any cleaning control method for the air conditioner.

[0015] In the air conditioner cleaning control method and air conditioner of the present invention, the heat exchanger heat transfer time within a first preset operating period is obtained based on the airflow temperature difference between the inlet and outlet sides of the refrigerant pipeline of the heat exchanger, and the need for cleaning of the heat exchanger is determined based on this heat transfer time. Since the heat transfer time is an objective quantitative indicator that directly characterizes the heat exchanger's heat exchange performance, using it as a condition for triggering cleaning allows for accurate determination of the heat exchanger's cleaning needs, thereby enabling on-demand cleaning. This fundamentally ensures that the heat exchanger is always in good heat exchange condition, avoiding resource waste caused by ineffective cleaning, promptly removing dirt and blockages to stably maintain the air conditioner's heat exchange efficiency, reducing unnecessary operating energy consumption, and ensuring the continuity of cooling and heating effects.

[0016] The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0017] The following sections will describe some specific embodiments of the invention in detail by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or portions. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings: Figure 1 This is a schematic flowchart of a cleaning control method for an air conditioner according to an embodiment of the present invention; Figure 2 This is a schematic flowchart of a cleaning control method for an air conditioner according to an embodiment of the present invention; Figure 3 This is a schematic flowchart of a cleaning control method for an air conditioner according to an embodiment of the present invention; Figure 4 This is a schematic flowchart of a cleaning control method for an air conditioner according to an embodiment of the present invention; Figure 5 This is a schematic flowchart of a cleaning control method for an air conditioner according to an embodiment of the present invention; Figure 6 This is a schematic flowchart of a cleaning control method for an air conditioner according to an embodiment of the present invention; Figure 7 This is a schematic flowchart of a cleaning control method for an air conditioner according to an embodiment of the present invention. Detailed Implementation

[0018] In the description of this embodiment, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature, that is, include one or more of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it encompasses, unless otherwise specifically described, this indicates that other features are not excluded and may be further included.

[0019] In the description of this embodiment, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0020] This invention provides a cleaning control method for air conditioners. Figure 1 This is a schematic flowchart of a cleaning control method for an air conditioner according to an embodiment of the present invention. The method generally includes: Step S110: Obtain the airflow temperature difference on both sides of the refrigerant inlet of the heat exchanger, denoted as the first temperature difference, and the airflow temperature difference on both sides of the refrigerant outlet of the heat exchanger, denoted as the second temperature difference. Step S120: Determine the heat exchange capacity of the heat exchanger within a first preset working time based on the first temperature difference and the second temperature difference; Step S130: Determine whether the heat exchanger needs to be cleaned based on the amount of heat exchanged.

[0021] Specifically, the first temperature difference refers to the temperature difference between the inlet air and the outlet air at the inlet location of the refrigerant pipeline entering the heat exchanger. This first temperature difference reflects the initial heat transfer intensity between the refrigerant and the air at the heat exchanger inlet section. The second temperature difference refers to the temperature difference between the inlet air and the outlet air at the outlet location of the refrigerant pipeline leaving the heat exchanger. This second temperature difference reflects the final heat transfer intensity between the refrigerant and the air at the heat exchanger outlet section.

[0022] In step S120, the compressor can be in standby mode during the first preset working time, that is, the compressor can be shut down when the temperature is reached.

[0023] In this embodiment, the heat exchanger's heat exchange capacity within a first preset operating time is obtained based on the temperature difference of the airflow between the inlet and outlet sides of the refrigerant pipeline. This heat exchange capacity is then used to determine whether the heat exchanger needs cleaning. Since heat exchange capacity is an objective quantitative indicator that directly characterizes the heat exchanger's performance, using it as a cleaning trigger allows for accurate determination of cleaning needs, enabling on-demand cleaning. This fundamentally ensures that the heat exchanger is always in good heat exchange condition, avoiding resource waste caused by ineffective cleaning, promptly removing blockages to maintain stable heat exchange efficiency, reducing unnecessary energy consumption, and ensuring continuous cooling and heating effects.

[0024] like Figure 2 As shown, in some optional embodiments of the present invention, before obtaining the first temperature difference and the second temperature difference, the method further includes: Step S210: Obtain the temperature difference between the two sides of the heat exchanger and record it as the third temperature difference; Step S220: Determine whether the third temperature difference meets the preset conditions; if so, proceed to step S110.

[0025] Specifically, the temperature difference between the two sides of the heat exchanger can reflect the overall temperature difference between the air inlet and air outlet sides of the heat exchanger.

[0026] In this embodiment, precise temperature difference detection and heat exchange calculation at both the inlet and outlet points are only initiated when the temperature difference across the heat exchanger meets preset conditions. This effectively avoids invalid detection and calculation when the heat exchanger is functioning normally, reducing the computational load on the air conditioner control system and further improving the operational efficiency of the cleaning control logic. Simultaneously, precise detection is triggered only when necessary, ensuring that the entire cleaning control process balances judgment accuracy and system operational economy, making on-demand cleaning more rational and optimizing the overall cleaning control strategy for the air conditioner.

[0027] In some optional embodiments of the present invention, the preset condition is that the third temperature difference gradually decreases and the third temperature difference changes linearly.

[0028] Specifically, the decrease in heat exchange capacity caused by heat exchanger fouling is gradual, corresponding to a linear decrease in the third temperature difference. Using this as a pre-set condition effectively eliminates interference from short-term operating condition fluctuations, thus achieving an accurate initial judgment of the fouling trend before starting precise calculations.

[0029] like Figure 3 As shown, in some optional embodiments of the present invention, determining the heat exchange capacity of the heat exchanger within a first preset operating time based on the first temperature difference and the second temperature difference includes: Step S121: Determine the average temperature difference based on the first temperature difference and the second temperature difference; the average temperature difference is half the sum of the first temperature difference and the second temperature difference. Step S122: Obtain the heat transfer coefficient and heat transfer area of ​​the heat exchanger; Step S123: Determine the heat exchange capacity of the heat exchanger within the first preset working time based on the heat transfer coefficient, heat exchange area, and average temperature difference within the first preset working time.

[0030] In this embodiment, a method for obtaining the heat exchanger's heat exchange capacity within a first preset operating time is provided. This method allows for the direct and accurate acquisition of the heat exchanger's heat exchange capacity within the first preset operating time, thus providing an objective and effective quantitative basis for determining cleaning requirements.

[0031] In some optional embodiments of the present invention, the formula for calculating the heat exchange within the first preset working time is: .

[0032] Wherein, the time interval between t2 and t1 is the first preset working duration; Q is the cumulative heat exchange within the first preset working duration.

[0033] Q t The instantaneous heat exchange is expressed by the following formula: .

[0034] Where U is the heat transfer coefficient and A is the heat transfer area. This is the average temperature difference calculated based on the first temperature difference and the second temperature difference.

[0035] Furthermore, in actual operation, the heat transfer coefficient of the heat exchanger will change due to environmental conditions. To reduce calculation errors, this embodiment processes the heat transfer coefficient as follows: within a first preset operating period, the heat transfer coefficients of several sampling points are obtained based on the compressor's operating frequency or changes in operating conditions. The average value of these values ​​is then taken as the heat transfer coefficient for that period. Because the fluctuation of the heat transfer coefficient is limited under similar operating conditions, this average value can effectively reflect the overall heat transfer characteristics during that period, thereby improving the stability and accuracy of the heat transfer calculation.

[0036] In some optional embodiments of the present invention, the first preset working time can be from 15 min to 30 min (e.g., 16 min, 18 min, 20 min, 25 min, 25 min, or 29 min). Preferably, the first preset working time is 20 min.

[0037] In some alternative embodiments of the present invention, the heat exchanger is an evaporator or a condenser.

[0038] like Figure 4 As shown, in some optional embodiments of the present invention, determining whether the heat exchanger needs cleaning based on the amount of heat exchange includes: Step S131: Obtain the difference between the heat exchange and the reference heat exchange; Step S132: If the difference is greater than or equal to the first threshold, it is determined that the heat exchanger needs to be cleaned.

[0039] In this embodiment, the difference between the actual heat exchange and the reference heat exchange can directly reflect the degree of degradation in the heat exchanger's heat exchange performance. When the difference reaches a first threshold, it indicates that the heat exchanger's heat exchange performance has degraded to the point of affecting normal operation due to dirt blockage. At this time, it is determined that the heat exchanger needs to be cleaned, and the air conditioner cleaning process begins. Conversely, when the difference is less than the first threshold, it is determined that the heat exchanger does not need to be cleaned. Using the method of this embodiment, accurate identification of when to clean the heat exchanger can be achieved.

[0040] In some optional embodiments of the present invention, the first threshold can be 50% to 85% of the reference heat exchange; preferably, the first threshold can be 80% of the reference heat exchange.

[0041] like Figure 5 As shown, in some optional embodiments of the present invention, the cleaning control method for the air conditioner further includes: Step S310: Obtain the operating parameters of the air conditioner; Step S320: Input the operating parameters into the trained reference heat exchanger model that represents the heat exchanger in a clean state to obtain the reference heat exchanger.

[0042] In this embodiment, a reference heat exchange model trained based on historical cleanliness data is used to dynamically generate a cleanliness reference heat exchange rate that matches the real-time operating parameters of the air conditioner, thus enabling the cleanliness judgment benchmark to have adaptive operating conditions. This effectively avoids false triggering or missed triggering caused by changes in environment and load, significantly improving the accuracy of cleanliness control judgment and the long-term stability of the system.

[0043] like Figure 6 As shown, in some optional embodiments of the present invention, the cleaning control method for the air conditioner further includes: Step S410: After cleaning the heat exchanger, record the operating parameters of the air conditioner within one or more consecutive second preset durations; the operating parameters include the operating frequency of the compressor, and the ambient temperature and / or ambient humidity of the space where the heat exchanger is located; the second preset duration is equal to the first preset duration. Step S420: Calculate the heat exchange capacity of the heat exchanger within the second preset working time based on the operating parameters; Step S430: Determine whether the difference between the heat exchanger's heat exchange capacity within the second preset working time and the reference heat exchange capacity is greater than or equal to a second threshold; if yes, proceed to step S440; if no, proceed to step S450. Step S440: Determine that the heat exchanger has not been completely cleaned, reduce the first threshold, and determine that the heat exchanger needs to be cleaned or issue a heat exchanger clogging warning. Step S450: The recorded operating parameters are used as sample data for the reference heat exchange model. The reference heat exchange model is trained or updated based on the sample data and the heat exchange of the heat exchanger within the second preset working time calculated based on the sample data.

[0044] Specifically, in step S410, the operating parameters refer to the operating parameters immediately after the heat exchanger is cleaned and started up, at which point the heat exchanger is in a clean state.

[0045] In this embodiment, a complete "execution-verification-learning" closed-loop control system is constructed by performing effect verification and model self-updating after cleaning the heat exchanger. First, by comparing the actual heat exchange after cleaning with the reference heat exchange, the cleaning effect can be accurately judged. If the expected results are not achieved, the judgment threshold is automatically adjusted or cleaning is retried, ensuring the effectiveness of the cleaning operation. Second, the confirmed effective operating data after cleaning is used as new sample data for incremental training of the reference heat exchange model, which significantly improves the accuracy and long-term stability of the cleaning judgment system throughout its entire lifecycle, achieving truly intelligent maintenance.

[0046] like Figure 7 As shown, in some optional embodiments of the present invention, the cleaning control method for the air conditioner further includes: Step S510: Obtain the parameters of the fouling risk factor of the space where the heat exchanger is located; Step S520: When the parameter of the fouling risk factor is greater than or equal to the threshold, the cumulative operating time of the heat exchanger is accumulated. Step S530: Decrease the first threshold based on the cumulative working time.

[0047] Specifically, the dirt risk factor in step S510 is used to quantify the impact of the environment on the dirt-clogging rate of the heat exchanger. Its parameters may include one or more of the following: the concentration of suspended particulate matter in the ambient air, the relative humidity of the environment, and the duration of a specific operating mode (such as continuous ventilation).

[0048] Step S520 may include: obtaining the cumulative operating time of the heat exchanger under the condition that the ambient humidity of its space is greater than or equal to a preset humidity; and / or, obtaining the cumulative operating time of the heat exchanger under the condition that the concentration of suspended particulate matter in its space is greater than or equal to a preset concentration.

[0049] In dusty environments, when the difference between the indoor unit's return air temperature and the set temperature remains small (indicating low load), but the fan continues to run at high speed, it may be in ventilation mode, leading to increased dust intake. In hot and humid weather, the evaporator surface remains constantly moist, making it easier for dust and particulate matter to adhere. Therefore, under these special operating conditions, reducing the first threshold based on the operating time when the dirt risk factor parameter is greater than or equal to the threshold allows for more sensitive cleaning demand assessment in harsh environments. This upgrade achieves environmental adaptive judgment, enabling timely cleaning intervention in the early stages of dirt accumulation and before performance degradation becomes severe, thereby improving the timeliness, preventative nature, and adaptability to different usage scenarios of cleaning control.

[0050] In some optional embodiments of the present invention, the dirt risk factor is one, and the step of reducing the first threshold according to the cumulative working time includes: reducing the first threshold when the cumulative working time is greater than or equal to the time threshold. In this embodiment, the sensitivity of cleaning demand judgment can be improved through the above settings.

[0051] In some optional embodiments of the present invention, the dirt risk factors are multiple, and the step of reducing the first threshold according to the cumulative working time includes: Step S531: Determine whether the overlapping working time of any two of the multiple cumulative working times is greater than the overlap threshold; if yes, proceed to S532; if no, proceed to S533. Step S532, decrease the first threshold; Step S533: When any of the cumulative working hours is greater than or equal to the corresponding duration threshold, decrease the first threshold.

[0052] Specifically, if there are multiple contamination risk factors, and the overlapping working time of any two of the multiple cumulative working times corresponding to these multiple contamination risk factors is less than or equal to a threshold, then the one that meets the condition first can have its first threshold reduced. If the overlapping working time is greater than the threshold, the first threshold is reduced.

[0053] This embodiment can adaptively adjust the sensitivity of cleaning demand judgment in complex situations where a single high-risk factor is continuously at work or multiple risk factors are superimposed, thereby ensuring timely cleaning while avoiding excessively frequent cleaning triggers due to short-term or isolated fluctuations in working conditions.

[0054] In some optional embodiments of the present invention, the cleaning control method for air conditioners further includes: Step S610: If the heat exchanger needs to be cleaned, determine whether a shutdown signal has been received. Step S620: If yes, clean the heat exchanger.

[0055] Specifically, the self-cleaning mode is activated only when the heat exchanger needs cleaning and a shutdown signal is received.

[0056] This embodiment effectively isolates cleaning and maintenance operations from air conditioning usage periods by linking the cleaning execution conditions with the air conditioning shutdown signal. This avoids any impact on the normal cooling / heating function of the air conditioner during the cleaning process, optimizing the user experience while ensuring equipment performance.

[0057] The flowchart provided in this embodiment is not intended to indicate that the operations of the method will be performed in any particular order, or that all operations of the method are included in every case. Furthermore, the method may include additional operations. Within the scope of the technical concept provided by the method in this embodiment, additional variations can be made to the above method.

[0058] This embodiment also provides an air conditioner. The air conditioner may include a memory, a processor, and the aforementioned computer program stored in the memory and running on the processor. The processor is adapted to execute stored instructions and may be a single-core processor, a multi-core processor, a computing cluster, or any number of other configurations. The memory provides temporary storage space for the operation of instructions during operation. The memory may include random access memory (RAM), read-only memory, flash memory, or any other suitable storage system. When the computer program is executed by the processor, it implements the steps of the cleaning control method of the air conditioner according to any of the above embodiments.

[0059] Therefore, those skilled in the art should recognize that although numerous exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Thus, the scope of the present invention should be understood and construed as covering all such other variations or modifications.

Claims

1. A cleaning control method for an air conditioner, characterized in that, include: The airflow temperature difference on both sides of the refrigerant inlet of the heat exchanger is recorded as the first temperature difference, and the airflow temperature difference on both sides of the refrigerant outlet of the heat exchanger is recorded as the second temperature difference. The heat exchanger's heat exchange capacity within a first preset operating time is determined based on the first temperature difference and the second temperature difference. The need for cleaning of the heat exchanger is determined based on the amount of heat exchanged.

2. The cleaning control method for an air conditioner according to claim 1, characterized in that, Before obtaining the first temperature difference and the second temperature difference, the method further includes: The temperature difference between the two sides of the heat exchanger is obtained and recorded as the third temperature difference; Determine whether the third temperature difference meets the preset conditions; If so, the temperature difference between the airflow on both sides of the refrigerant inlet of the heat exchanger and the temperature difference between the airflow on both sides of the refrigerant outlet of the heat exchanger are obtained.

3. The cleaning control method for an air conditioner according to claim 2, characterized in that, The preset condition is that the third temperature difference gradually decreases and the third temperature difference changes linearly; The cleaning control method further includes: If the heat exchanger needs cleaning, determine whether a shutdown signal has been received; If so, clean the heat exchanger.

4. The cleaning control method for an air conditioner according to claim 1, characterized in that, Determining the heat exchange capacity of the heat exchanger within a first preset operating time based on the first temperature difference and the second temperature difference includes: The average temperature difference is determined based on the first temperature difference and the second temperature difference; the average temperature difference is half the sum of the first temperature difference and the second temperature difference. Obtain the heat transfer coefficient and heat transfer area of ​​the heat exchanger; The heat exchanger's heat exchange capacity within the first preset operating time is determined based on the heat transfer coefficient, heat exchange area, and average temperature difference within the first preset operating time.

5. The cleaning control method for an air conditioner according to claim 1, characterized in that, The step of determining whether the heat exchanger needs cleaning based on the amount of heat exchange includes: Obtain the difference between the heat exchange and the reference heat exchange; If the difference is greater than or equal to a first threshold, it is determined that the heat exchanger needs to be cleaned.

6. The cleaning control method for an air conditioner according to claim 5, characterized in that, Also includes: Obtain the operating parameters of the air conditioner; The operating parameters are input into a pre-trained reference heat exchanger model that characterizes the heat exchanger in a clean state to obtain the reference heat exchanger.

7. The cleaning control method for an air conditioner according to claim 6, characterized in that, Also includes: After cleaning the heat exchanger, the operating parameters of the air conditioner are recorded within one or more consecutive second preset time periods; the operating parameters include the operating frequency of the compressor, and the ambient temperature and / or ambient humidity of the space where the heat exchanger is located; the second preset time period is equal to the first preset time period; The heat exchanger's heat exchange capacity during the second preset operating time is calculated based on the operating parameters. Determine whether the difference between the heat exchanger's heat exchange capacity within a second preset operating time and the reference heat exchange capacity is greater than or equal to a second threshold. If so, if it is determined that the heat exchanger has not been completely cleaned, the first threshold is reduced, and it is determined that the heat exchanger needs to be cleaned or a heat exchanger clogging warning is issued. If not, the recorded operating parameters are used as sample data for the reference heat exchanger model, and the reference heat exchanger model is trained or updated based on the sample data and the heat exchanger heat exchanged within the second preset operating time calculated based on the sample data.

8. The cleaning control method for an air conditioner according to claim 5, characterized in that, Also includes: Obtain parameters of the fouling risk factor of the space where the heat exchanger is located; When the parameter of the fouling risk factor is greater than or equal to the threshold, the cumulative operating time of the heat exchanger is accumulated; The first threshold is reduced based on the cumulative working time.

9. The cleaning control method for an air conditioner according to claim 8, characterized in that, The dirt risk factor is one, and the step of reducing the first threshold based on the cumulative working time includes: When the cumulative working time is greater than or equal to the time threshold, decrease the first threshold; or, The dirt and grime risk factors are multiple, and the step of reducing the first threshold based on the cumulative working time includes: Determine whether the overlapping working time of any two of the multiple cumulative working times is greater than the overlap threshold; If so, decrease the first threshold; If not, when any of the cumulative working hours is greater than or equal to the corresponding duration threshold, the first threshold is reduced.

10. An air conditioner, characterized in that, The device includes a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the cleaning control method for the air conditioner according to any one of claims 1 to 9.

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