Self-cleaning control method and device of air conditioner and air conditioner

Abstract

The embodiment of the invention provides a self-cleaning control method and device of an air conditioner and the air conditioner. The self-cleaning control method comprises the steps that target operation parameters of the air conditioner and the initial working current of a motor are obtained; obtaining the current working current of the motor at different moments, and calculating the difference value between the initial working current and the current working current; obtaining a correction parameter according to the difference value and a preset assignment graph; and correcting the target operation parameters according to the correction parameters. According to the embodiment of the invention, the difference value between the initial working current and the current working current is calculated according to the increase of the water hanging amount of the indoor unit in the condensation process, so that the difference value is matched with the preset assignment diagram to obtain the correction parameter, and in the subsequent operation process, the target operation parameter is dynamically corrected through the correction parameter, so that the operation efficiency is improved. Condensation and frosting of the evaporator are sufficient, and the self-cleaning effect of the indoor unit is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to a self-cleaning control method and device for an air conditioner, and the air conditioner. Background Art

[0002] In air conditioners, the self-cleaning function of the indoor unit is crucial to maintaining air conditioning performance and indoor air quality. The traditional self-cleaning mode of the indoor unit includes stages such as condensation, frosting, defrosting and high-temperature sterilization. In the self-cleaning scheme of the prior art, the condensation stage and the defrost stage are usually controlled by fixed preset parameters, among which the key control parameters are the target internal pipe temperature and the operating time. However, there is diversity in indoor humidity conditions, and the humidity in different environments varies greatly, and the fixed target internal pipe temperature and operating time cannot adapt to such changes.

[0003] For example, in the condensation stage, when the indoor unit is set to a fixed target inner tube temperature, if the indoor inner ring humidity is at a low level, it is very likely to cause insufficient condensation. This is because under low humidity conditions, the fixed inner tube temperature may not allow the water vapor in the air to fully condense on the evaporator surface, which in turn affects the subsequent cleaning effect and cannot effectively remove impurities such as dust and dirt on the evaporator. Similarly, similar problems are faced in the frosting stage. Fixed parameters make it difficult to ensure sufficient frosting under various humidity conditions, so that the dirt on the evaporator surface cannot be completely wrapped and removed, affecting the overall self-cleaning effect.

[0004] In addition, as the amount of water hanging on the indoor evaporator increases during the condensation process, the air output of the indoor unit will decrease accordingly, and the motor current will show a downward trend. Moreover, under the same internal pipe temperature conditions, the higher the internal humidity, the faster the evaporator hangs water, and the faster the motor current decreases. However, the existing fixed parameter control mode cannot be dynamically adjusted according to this phenomenon, resulting in poor self-cleaning effect. Summary of the invention

[0005] The embodiments of the present invention provide a self-cleaning control method and device for an air conditioner, and an air conditioner, aiming to solve the problem that the parameters of the existing self-cleaning solution cannot be dynamically adjusted, resulting in poor self-cleaning effect.

[0006] In a first aspect, an embodiment of the present invention provides a self-cleaning control method for an air conditioner, wherein the air conditioner includes a motor, including:

[0007] When the air conditioner is in the internal unit self-cleaning mode, obtaining target operating parameters of the air conditioner and the initial operating current of the motor, wherein the target operating parameters include a target internal pipe temperature and a target operating time;

[0008] Obtaining the current working current of the motor at different times, and calculating the difference between the initial working current and the current working current;

[0009] According to the difference and a preset assignment diagram, a correction parameter is obtained, wherein the assignment diagram includes an association relationship between different difference values ​​and the correction parameter;

[0010] The target operating parameters are corrected according to the correction parameters.

[0011] In a second aspect, an embodiment of the present invention provides a self-cleaning control device for an air conditioner, comprising:

[0012] An operating parameter acquisition unit, used to acquire target operating parameters of the air conditioner and an initial operating current of the motor when the air conditioner is in an internal unit self-cleaning mode, wherein the target operating parameters include a target internal pipe temperature and a target operating time;

[0013] A current calculation unit, used to obtain the current working current of the motor at different times, and calculate the difference between the initial working current and the current working current;

[0014] A correction parameter acquisition unit, used to obtain the correction parameter according to the difference and a preset assignment diagram, wherein the assignment diagram includes an association relationship between different difference values ​​and the correction parameter;

[0015] A correction unit is used to correct the target operating parameter according to the correction parameter.

[0016] In a third aspect, an embodiment of the present invention provides an air conditioner, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the control method described above when executing the computer program.

[0017] The embodiment of the present invention provides a self-cleaning control method, device and air conditioner for an air conditioner, and the self-cleaning control method includes: obtaining the target operating parameters of the air conditioner and the initial working current of the motor; obtaining the current working current of the motor at different times, and calculating the difference between the initial working current and the current working current; obtaining a correction parameter according to the difference and a preset assignment diagram; and correcting the target operating parameter according to the correction parameter. This embodiment calculates the difference between the initial working current and the current working current according to the increase in the amount of water hanging in the indoor unit during the condensation process, so as to match the difference with the preset assignment diagram to obtain the correction parameter. In the subsequent operation process, the target operating parameter is dynamically corrected by the correction parameter, so that the evaporator condenses and frosts sufficiently, and the self-cleaning effect of the indoor unit is guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0019] Figure 1 A schematic flow chart of a self-cleaning control method for an air conditioner provided by an embodiment of the present invention;

[0020] Figure 2 A graph showing the variation of the motor operating current provided by an embodiment of the present invention;

[0021] Figure 3 A first assignment graph provided by an embodiment of the present invention;

[0022] Figure 4 A second assignment diagram provided by an embodiment of the present invention;

[0023] Figure 5 A schematic diagram of a sub-flow chart of a self-cleaning control method for an air conditioner provided by an embodiment of the present invention;

[0024] Figure 6 A schematic block diagram of a self-cleaning control device for an air conditioner provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0027] It should also be understood that the terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0028] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0029] See also Figure 1 , an embodiment of the present invention provides a self-cleaning control method for an air conditioner, wherein the air conditioner includes a motor, including S10-S40:

[0030] S10, when the air conditioner is in the internal unit self-cleaning mode, obtaining target operating parameters of the air conditioner and the initial operating current of the motor, wherein the target operating parameters include a target internal pipe temperature and a target operating time;

[0031] In this step, in the control system of the air conditioner, upon receiving the start instruction of the indoor unit self-cleaning mode, the air conditioner obtains the pre-stored target operation parameter reference table, selects the corresponding target inner pipe temperature and target operation time from the reference table, and sets them as the target operation parameters of the indoor unit self-cleaning mode, that is, the parameters that have not been corrected, wherein the target inner pipe temperature includes the target inner pipe temperature in the condensation stage (T 凝露基础 ) and the target internal pipe temperature (T 结霜基础 ), the target operating time includes the target operating time of the condensation stage (t 凝露基础 ) and the target operating time of the frosting stage (t 结霜基础 ). In addition, the current detection module connected to the motor is used to detect the working current of the motor at different times in real time. When the motor runs stably, the working current at the current time is obtained as the initial working current.

[0032] In one embodiment, S10 includes:

[0033] Control the motor to run at a preset speed and control the compressor not to start, and after the motor runs for a predetermined time, obtain the initial working current of the motor;

[0034] In this embodiment, the air conditioner sends a start command to the motor drive circuit and controls the motor to run at a preset speed. At this time, the compressor is controlled not to start. During the operation of the motor, the working current and speed of the motor are monitored to ensure that the motor can start smoothly and the speed reaches the preset speed. Figure 2 As shown, when the speed has not reached the preset speed, as the running time increases, the motor current continues to increase (i.e. the first stage). When the speed reaches the preset speed, the evaporator tube temperature is equal to the indoor temperature, and there is no condensation on the evaporator. At this time, the motor has been running for a preset time t1 and is running stably. At this time, the working current at the current running moment is obtained as the initial working current.

[0035] In specific implementation, whether the motor is running stably can also be judged in the following ways: a. Preset a speed fluctuation threshold, such as ±2%. The speed sensor (such as Hall sensor, photoelectric encoder, etc.) installed on the motor shaft monitors the motor speed in real time. Within a period of time after the motor is started, the speed change is continuously observed. If the speed is maintained within the range of ±2% of the preset speed for multiple consecutive sampling cycles (such as 10 cycles, each cycle is 0.1 seconds), the motor speed can be preliminarily judged to be stable. b. Calculate the speed change rate, that is, the change in speed per unit time. When the speed change rate gradually approaches zero, it means that the motor is gradually stable. c. Current fluctuation amplitude: Use a current sensor to measure the working current of the motor and set an allowable range of current fluctuation, such as ±5% of the rated current. During the operation of the motor, observe the current fluctuation. If the current always fluctuates within the range of ±5% of the rated current within a period of time (such as 5 seconds), it means that the motor operation state is relatively stable. For example, if the rated current of the motor is 5A, then when the actual current changes between 4.75A and 5.25A, it can be considered that the motor is running stably. d. Install a temperature sensor (such as a thermistor) inside the motor to monitor the motor's winding temperature. During the start-up and initial operation of the motor, the winding temperature will gradually rise due to high current and mechanical friction. When the winding temperature rises to the preset temperature, the motor can be considered to be running stably.

[0036] S20, obtaining the current working current of the motor at different times, and calculating the difference between the initial working current and the current working current;

[0037] Combination Figure 2As shown, in the operation stage, the change of the motor current is divided into three stages according to the operation time, namely, the first stage less than or equal to the operation time t1, the second stage greater than the operation time t1 and less than the operation time t2, and the third stage greater than or equal to the operation time t2. In the first stage, the compressor is not started, the evaporator is not hung with water, and as the motor speed increases, the motor working current increases, and the current stabilizes when the preset speed is reached; in the second stage, the compressor needs to be controlled to start so that the inner tube temperature is reduced. As the operation time increases, the evaporator is continuously hung with water, the air outlet is continuously reduced, and the motor working current gradually decreases; in the third stage, the amount of water hanging on the evaporator reaches the maximum, and the motor working current is stable at this time until the end of the operation stage. In the second stage, this embodiment obtains the current working current of the motor at different times, that is, after the compressor is started, the current working current of the motor is recorded at different times, and the difference between the initial working current and the current working current is calculated, which can be the difference obtained by subtracting the current working current from the initial working current. The principle is that under the same inner tube temperature, the higher the humidity inside, the greater the amount of water hanging on the evaporator, the smaller the air outlet of the indoor unit, and the smaller the motor working current. The difference represents the amount of water hanging on the evaporator. The larger the difference, the more water hanging, and the higher the indoor humidity. Subsequent corrections will be made based on the difference.

[0038] S30, obtaining correction parameters according to the difference and a preset assignment diagram, wherein the assignment diagram includes associations between different difference values ​​and correction parameters;

[0039] In this step, a preset assignment graph is required. The assignment graph can be in the form of a table, a chart, or a mathematical function relationship. For example, if the assignment graph is a linear function relationship, the assignment graph can be set to a table so that each difference corresponds to a correction parameter value. In other scenarios, the assignment graph may be a nonlinear function relationship, such as a quadratic function, an exponential function, etc. The relationship between the difference and the correction parameter can be described by a mathematical expression. According to the obtained difference, search for the correction parameter that matches the difference in the preset assignment graph. If the assignment graph is in the form of a table, then the difference can be compared with the value of the predefined correction parameter in the table by traversing each row of the table; if the assignment graph is a mathematical function relationship, then the difference is substituted into the function expression for calculation. For example, if the function relationship of the assignment graph is correction parameter = 0.5*difference 2 +2, when the difference is 3, the calculated correction parameter = 0.5*3 2 +2=6.5. In specific implementation, for the difference value that exceeds the range defined by the assignment diagram, a special processing method needs to be adopted, such as issuing an alarm to remind the user that the difference value exceeds the range.

[0040] In one embodiment, S30 includes:

[0041] Matching the difference with a preset first assignment map, and confirming the inner tube temperature correction parameter according to the matching result; wherein the first assignment map includes the association relationship between different difference values ​​and the inner tube temperature correction parameter;

[0042] And / or, matching the difference with a preset second assignment graph, and confirming the runtime correction parameter according to the matching result; wherein the second assignment graph includes an association relationship between different difference values ​​and the runtime correction parameter.

[0043] In this embodiment, since the target operating parameters include the target internal pipe temperature and the target operating time, corresponding assignment graphs need to be set respectively. For the target internal pipe temperature, a first assignment graph is set, and for the target operating time, a second assignment graph is set. During the self-cleaning process of the air conditioner, the difference is matched with the first assignment graph (and / or the second assignment graph), and the correction parameters of the corresponding operating parameters are confirmed according to the matching results.

[0044] In specific implementation, combined with Figure 3 As shown, the first value assignment diagram includes a first value assignment interval, a second value assignment interval and a third value assignment interval, and the first value assignment interval includes the association relationship between different difference values ​​and the inner tube temperature correction parameter.

[0045] The first assignment map includes a value less than or equal to a first preset difference value I 差值1 The first assignment interval is greater than the first preset difference I 差值1 and is less than the second preset difference I 差值2 The second assignment interval is greater than or equal to the second preset difference I 差值2 The third assignment interval of 差值1 Less than I 差值2 ;

[0046] Among them, in the first assignment interval, the inner tube temperature correction parameter is a fixed value and a negative value. At this time, the difference is small, the evaporator water hanging amount is small, and the indoor humidity is low, and the target inner tube temperature (T 凝露基础 and T 结霜基础 ), in order to ensure the condensation effect, so at this time the inner tube temperature correction parameter is a negative number, and the value is fixed and the minimum value, when the difference is equal to the first preset difference I 差值1, the absolute value of the correction parameter is the largest, and the correction effect is the largest; in the second assignment interval, the absolute value of the inner tube temperature correction parameter is negatively correlated with the difference and the inner tube temperature correction parameter is a negative value. At this time, as the difference increases, the amount of water hanging increases, which means that the corresponding indoor humidity is also increasing. The higher the humidity, the lower the correction effect. Therefore, in the second assignment interval, as the difference gradually increases, the correction effect is smaller, and the absolute value of the inner tube temperature correction parameter is smaller; in the third assignment interval, the amount of water hanging on the evaporator is large, the indoor humidity is high, and the condensation is sufficient, so no correction is required, so the inner tube temperature correction parameter is 0. In specific implementation, the actual value of the inner tube temperature correction parameter with the largest correction effect is related to the cooling capacity section of the internal machine and the type of motor. Its range can be set to 2-5°C, the range of the first preset difference can be set to 0-0.06A, and the range of the second preset difference can be set to 0.06-0.12A.

[0047] Combination Figure 4 As shown, the second value assignment diagram includes the first value assignment interval, the second value assignment interval and the third value assignment interval;

[0048] Among them, in the first assignment interval, the running time correction parameter is a fixed value and a positive value; in the second assignment interval, the absolute value of the running time correction parameter is negatively correlated with the difference and the running time correction parameter is a positive value; in the third assignment interval, the running time correction parameter is 0.

[0049] In this embodiment, the target running time (t 凝露基础 and t 结霜基础 ) also needs to be corrected and extended, and the operating time correction parameter is matched through the second assignment diagram. The first assignment interval, the second assignment interval and the third assignment interval of the second assignment diagram are divided in the same way as the first assignment interval, the second assignment interval and the third assignment interval of the first assignment diagram. The difference is that the inner tube temperature correction parameter in the first assignment diagram is a negative value and 0, while the operating time correction parameter in the second assignment diagram is a positive value and 0. In the actual application process, in order to simplify the calculation, the difference and the correction parameter can be a mapping relationship, that is, different correction parameters corresponding to different difference ranges are specified in a table form, for example, the first preset difference < difference ≤ second preset difference, the corresponding correction parameter = correction parameter 1, the second preset difference < difference ≤ third preset difference, the corresponding correction parameter = correction parameter 2. In the specific implementation, the first preset difference and the second preset difference associated with the three assignment intervals of the second assignment diagram can be the same as the first preset difference and the second preset difference associated with the three assignment intervals of the first assignment diagram, or they can be different.

[0050] S40: Correct the target operating parameters according to the correction parameters.

[0051] In this step, the corresponding correction parameter is obtained in the corresponding assignment diagram according to the difference, and the correction is performed in the form of operating parameter + correction parameter. Specifically, the target inner tube temperature (T 凝露基础 and T 结霜基础 ) is corrected; and / or, the target running time (t 凝露基础 and t 结霜基础 ) for correction. For example, when the target inner tube temperature is 20°C, when the difference is 0.07, in the first assignment diagram, the matching inner tube temperature correction parameter is -3, then the correction is made in the manner of corrected target inner tube temperature = target inner tube temperature + inner tube temperature correction parameter, that is, the corrected target inner tube temperature is 20-3 = 17°C, at this time, the corrected target inner tube temperature is reduced; when the target operating time is 10min, when the difference is 0.07, in the second assignment diagram, the matching operating time correction parameter is 3, then the correction is made in the manner of corrected target operating time = target operating time + operating time correction parameter, that is, the corrected target operating time is 10+3 = 13min, at this time, the corrected target operating time is extended. In specific applications, the parameter correction method can also be corrected as corrected operating parameter = target operating parameter * correction parameter.

[0052] like Figure 5 As shown, the self-cleaning control method of the air conditioner also includes:

[0053] S50, in the current operation stage, controlling the current inner tube temperature to decrease to the corrected target inner tube temperature, and starting timing when the current inner tube temperature is equal to the corrected target inner tube temperature, wherein the operation stage includes a condensation stage and a frosting stage;

[0054] S60, obtaining the actual running time after timing, comparing the actual running time with the corrected target running time, and if the actual running time is equal to the corrected target running time, ending the current running stage of the air conditioner;

[0055] Alternatively, when the entire operation time of the current operation phase reaches a preset maximum value, the current operation phase of the air conditioner is ended.

[0056] In this embodiment, the motor is controlled to continue to run at the preset speed. At this time, the inner tube temperature is controlled according to the corrected target inner tube temperature (T 凝露 and T 结霜 ) is controlled (i.e., the compressor is controlled to run at a preset speed, and the internal pipe temperature is maintained at the corrected target internal pipe temperature by adjusting the electronic expansion valve) until T 当前内管温 =T 凝露 (T 结霜), if the end condition of the operation stage is met (i.e., one of the two conditions of S60), the corresponding operation stage is controlled to end. For example, if the corrected target operation time is 10 minutes, then when the actual operation time t=10 minutes after the start of the timing, the condensation stage ends. It should be noted that the actual operation time is the operation time after the current inner tube temperature is equal to the corrected target inner tube temperature, and the entire operation time is the total operation time from the beginning to the end of the entire operation stage.

[0057] In addition, when the air conditioner enters the frosting stage, the motor stops running, and the inner pipe temperature will further decrease until T 当前内管温 =(T 结霜 ), it should be noted here that as the evaporator of the indoor unit continues to frost, the internal pipe temperature will not be maintained at T 结霜 , but continues to decrease until the frosting stage ends.

[0058] In the specific implementation, the condensation stage can be completed according to the steps of S10-S60. After the condensation stage is over, the air conditioner enters the frosting stage. As for the frosting stage, the parameters can be corrected in the same way as the condensation stage, except that the initial working current of the condensation stage can be directly used, and then the current working current at different times in the frosting stage is obtained in real time, and the difference between the initial working current and the current working current is calculated, and the corresponding correction parameters are obtained according to the difference and the preset assignment diagram (the frosting stage also has the first assignment diagram and the second assignment diagram, and the association relationship can be different from that of the condensation stage), and then the target operating parameters are corrected according to the correction parameters, and then S50 and S60 are executed to end the frosting stage. That is, S10-60 can be executed in the frosting stage, but there is no need to re-obtain the initial working current. Of course, the initial working current can also be re-obtained.

[0059] In specific implementation, after the frosting stage, the air conditioner will enter the defrosting stage and high-temperature sterilization stage. At this time, the air conditioner switches to heating mode, the evaporator defrosts, the internal pipe temperature rises and maintains for a period of time, thereby realizing the evaporator sterilization function. After completion, the self-cleaning of the internal unit ends.

[0060] In the control method of the embodiment of the present invention, the motor current difference before and after the evaporator condenses is added to correct the target operating parameters, so that the operating parameters under different indoor humidity are more accurate and the self-cleaning effect is better. That is, when the indoor humidity is high, no correction is required, and the correction parameter is 0. The air conditioner operates according to the preset target operating parameters. As the humidity decreases, the corrected target internal pipe temperature gradually decreases, and the operating time is prolonged, thereby ensuring the condensation and frosting effect of the evaporator. The air conditioner can use different operating parameters to operate under different indoor humidity conditions, so that the evaporator condenses and frosts sufficiently, ensuring the self-cleaning effect of the indoor unit. This implementation is equivalent to an air conditioner with an indoor humidity sensor, but the embodiment of the present invention does not require an indoor humidity sensor, thereby reducing costs.

[0061] The embodiment of the present invention also provides a self-cleaning control device for an air conditioner, which is used to execute any embodiment of the self-cleaning control method for an air conditioner. Figure 6 , Figure 6 : is a schematic block diagram of a self-cleaning control device for an air conditioner provided by an embodiment of the present invention. The self-cleaning control device 700 for an air conditioner comprises:

[0062] The operating parameter acquisition unit 710 is used to acquire the target operating parameters of the air conditioner and the initial operating current of the motor when the air conditioner is in the internal unit self-cleaning mode, wherein the target operating parameters include the target internal pipe temperature and the target operating time;

[0063] A current calculation unit 720, used to obtain the current working current of the motor at different times, and calculate the difference between the initial working current and the current working current;

[0064] A correction parameter acquisition unit 730, configured to obtain a correction parameter according to the difference and a preset assignment diagram, wherein the assignment diagram includes an association relationship between different difference values ​​and the correction parameter;

[0065] The correction unit 740 is used to correct the target operating parameter according to the correction parameter.

[0066] In one embodiment, the operating parameter acquisition unit 710 is used to:

[0067] Control the motor to run at a preset speed and control the compressor not to start, and after the motor runs for a predetermined time, obtain the initial working current of the motor;

[0068] In one embodiment, the current calculation unit 720 is used to:

[0069] The compressor is controlled to start, and after starting, the current working current of the motor at different times is recorded.

[0070] In one embodiment, the correction parameter acquisition unit 730 is used to:

[0071] Matching the difference with a preset first assignment map, and confirming the inner tube temperature correction parameter according to the matching result; wherein the first assignment map includes the association relationship between different difference values ​​and the inner tube temperature correction parameter;

[0072] And / or, matching the difference with a preset second assignment graph, and confirming the runtime correction parameter according to the matching result; wherein the second assignment graph includes an association relationship between different difference values ​​and the runtime correction parameter.

[0073] The first value assignment diagram includes a first value assignment interval, a second value assignment interval and a third value assignment interval. The first value assignment interval includes associations between different differences and inner tube temperature correction parameters.

[0074] The first assignment map includes a value less than or equal to a first preset difference value I 差值1 The first assignment interval is greater than the first preset difference I 差值1 and is less than the second preset difference I 差值2 The second assignment interval is greater than or equal to the second preset difference I 差值2 The third assignment interval of 差值1 Less than I 差值2 ;

[0075] Among them, in the first assignment interval, the inner pipe temperature correction parameter is a fixed value and a negative value; in the second assignment interval, the absolute value of the inner pipe temperature correction parameter is negatively correlated with the difference and the inner pipe temperature correction parameter is a negative value; in the third assignment interval, the inner pipe temperature correction parameter is 0.

[0076] The second value assignment graph includes the first value assignment interval, the second value assignment interval and the third value assignment interval;

[0077] Among them, in the first assignment interval, the running time correction parameter is a fixed value and a positive value; in the second assignment interval, the absolute value of the running time correction parameter is negatively correlated with the difference and the running time correction parameter is a positive value; in the third assignment interval, the running time correction parameter is 0.

[0078] In one embodiment, the correction unit 740 is used to:

[0079] Correcting the target inner tube temperature according to the inner tube temperature correction parameter;

[0080] And / or, the target running time is corrected according to the running time correction parameter.

[0081] The self-cleaning control method of the air conditioner also includes:

[0082] A timing unit, used for controlling the current inner tube temperature to decrease to the corrected target inner tube temperature in the current operation stage, and starting timing when the current inner tube temperature is equal to the corrected target inner tube temperature, wherein the operation stage includes a condensation stage and a frosting stage;

[0083] an end unit, used for obtaining the actual running time after timing, and comparing the actual running time with the corrected target running time; if the actual running time is equal to the corrected target running time, then ending the current running stage of the air conditioner;

[0084] Alternatively, when the entire operation time of the current operation phase reaches a preset maximum value, the current operation phase of the air conditioner is ended.

[0085] An embodiment of the present invention provides an air conditioner, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the self-cleaning control method of the air conditioner as described in the above embodiment when executing the computer program.

[0086] Those skilled in the art can clearly understand that, for the convenience and simplicity of description, the specific working process of the above-described equipment, devices and units can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here. Those of ordinary skill in the art can appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, computer software or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to the function. Whether these functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0087] In the several embodiments provided by the present invention, it should be understood that the disclosed equipment, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. Units with the same function may also be combined into one unit. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interfaces, devices or units, or may be an electrical, mechanical or other form of connection.

[0088] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the embodiments of the present invention.

[0089] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0090] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A self-cleaning control method for an air conditioner, the air conditioner comprising a motor, characterized in that: include: When the air conditioner is in the internal unit self-cleaning mode, obtaining target operating parameters of the air conditioner and the initial operating current of the motor, wherein the target operating parameters include a target internal pipe temperature and a target operating time; Obtaining the current working current of the motor at different times, and calculating the difference between the initial working current and the current working current; According to the difference and a preset assignment diagram, a correction parameter is obtained, wherein the assignment diagram includes an association relationship between different difference values ​​and the correction parameter; The target operating parameters are corrected according to the correction parameters.

2. The self-cleaning control method according to claim 1, wherein the air conditioner comprises a compressor, characterized in that: Obtaining the initial working current of the motor, including: controlling the motor to run at a preset speed and controlling the compressor not to start, and obtaining the initial working current of the motor after the motor runs for a predetermined time; Acquiring the current working current of the motor at different times includes: controlling the compressor to start, and recording the current working current of the motor at different times after starting.

3. The self-cleaning control method according to claim 1, characterized in that: The step of obtaining the correction parameter according to the difference and a preset value assignment diagram includes: Matching the difference with a preset first assignment map, and confirming the inner tube temperature correction parameter according to the matching result; wherein the first assignment map includes the association relationship between different difference values ​​and the inner tube temperature correction parameter; And / or, matching the difference with a preset second assignment graph, and confirming the runtime correction parameter according to the matching result; wherein the second assignment graph includes an association relationship between different difference values ​​and the runtime correction parameter.

4. The self-cleaning control method according to claim 3, characterized in that: The step of correcting the target operating parameter according to the correction parameter includes: Correcting the target inner tube temperature according to the inner tube temperature correction parameter; And / or, the target running time is corrected according to the running time correction parameter.

5. The self-cleaning control method according to claim 3, characterized in that: The first value assignment diagram includes a first value assignment interval, a second value assignment interval and a third value assignment interval. The first value assignment interval includes associations between different differences and inner tube temperature correction parameters.

6. The self-cleaning control method according to claim 5, characterized in that: The first assignment map includes a value less than or equal to a first preset difference value I 差值1 The first assignment interval is greater than the first preset difference I 差值1 and is less than the second preset difference I 差值2 The second assignment interval is greater than or equal to the second preset difference I 差值2 The third assignment interval of 差值1 Less than I 差值2 ; Among them, in the first assignment interval, the inner pipe temperature correction parameter is a fixed value and a negative value; in the second assignment interval, the absolute value of the inner pipe temperature correction parameter is negatively correlated with the difference and the inner pipe temperature correction parameter is a negative value; in the third assignment interval, the inner pipe temperature correction parameter is 0.

7. The self-cleaning control method according to claim 6, characterized in that: The second value assignment graph includes the first value assignment interval, the second value assignment interval and the third value assignment interval; Among them, in the first assignment interval, the running time correction parameter is a fixed value and a positive value; in the second assignment interval, the absolute value of the running time correction parameter is negatively correlated with the difference and the running time correction parameter is a positive value; in the third assignment interval, the running time correction parameter is 0.

8. The self-cleaning control method according to claim 1, characterized in that: Also includes: In the current operation stage, the current inner tube temperature is controlled to be reduced to the corrected target inner tube temperature, and timing is started when the current inner tube temperature is equal to the corrected target inner tube temperature, wherein the operation stage includes a condensation stage and a frosting stage; Acquire the actual running time after timing, and compare the actual running time with the corrected target running time; if the actual running time is equal to the corrected target running time, end the current running stage of the air conditioner; Alternatively, when the entire operation time of the current operation phase reaches a preset maximum value, the current operation phase of the air conditioner is ended.

9. A self-cleaning control device for an air conditioner, applied to the self-cleaning control method according to any one of claims 1 to 8, characterized in that: include: An operating parameter acquisition unit, used to acquire target operating parameters of the air conditioner and an initial operating current of the motor when the air conditioner is in an internal unit self-cleaning mode, wherein the target operating parameters include a target internal pipe temperature and a target operating time; A current calculation unit, used to obtain the current working current of the motor at different times, and calculate the difference between the initial working current and the current working current; A correction parameter acquisition unit, used to obtain the correction parameter according to the difference and a preset assignment diagram, wherein the assignment diagram includes an association relationship between different difference values ​​and the correction parameter; A correction unit is used to correct the target operating parameter according to the correction parameter.

10. An air conditioner, characterized in that: The method comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the self-cleaning control method according to any one of claims 1 to 8 when executing the computer program.

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