Air conditioner stepper motor control method, air conditioner refrigeration control method and air conditioner

Abstract

This application discloses a control method for a stepper motor used in air conditioning, a refrigeration control method for an air conditioner, and an air conditioner, belonging to the field of electrical equipment control. The control method for the stepper motor includes acquiring operating parameters of target devices within the air conditioner, wherein the target devices include those that positively influence the formation of condensation in the air conditioner; if the operating parameters meet preset condensation formation conditions, the stepper motor is powered on and locked, wherein when the stepper motor is locked, its rotor is stationary. This application embodiment has the technical effect of controlling the stepper motor to power on and lock when the operating parameters meet the condensation formation conditions. The powered-on and locked stepper motor generates its own heat, increasing its temperature and making it less prone to condensation, thereby protecting the stepper motor and preventing safety issues.

Description

Technical Field

[0001] This application relates to the field of electrical equipment control, and more specifically, to a control method for a stepper motor used in air conditioning, a refrigeration control method for air conditioning, and an air conditioner. Background Technology

[0002] As an air conditioner, an air conditioner often has many moving parts or moving air guides for distributing air or other purposes. These moving structures are generally driven by stepper motors. When the air humidity in the operating environment is high, as the air conditioner cools, water vapor in the air often forms a lot of condensation in and around its air ducts, including the stepper motors near the air ducts. If condensation forms on the surface of the stepper motor or even inside it, it can cause the stepper motor to become damp, leading to corrosion, insulation failure, and even electrical safety problems.

[0003] In the industry, the design for moisture protection of stepper motors inside air conditioners often involves adding additional auxiliary materials such as sponges, rubber blocks, and damping blocks near the stepper motor to seal and isolate the surrounding structure from cold air or to keep it warm, thereby achieving the purpose of moisture protection for the stepper motor. However, these auxiliary materials are not only easily damaged, but also require regular maintenance, which increases the material cost of the air conditioner. Summary of the Invention

[0004] This application provides a control method for a stepper motor used in air conditioning, a refrigeration control method for air conditioning, and an air conditioner, so as to at least solve the technical problem of high material costs for air conditioners.

[0005] According to a first aspect of the embodiments of this application, a control method for a stepper motor for an air conditioner is provided, the method comprising:

[0006] Obtain condensation-affecting parameters of air conditioners, wherein the condensation-affecting parameters include at least one of the operating parameters of target devices inside the air conditioner and environmental parameters, wherein the target devices include devices that affect the formation of condensate in the air conditioner;

[0007] Determine whether the preset condensation formation conditions are met based on the condensation impact parameters of the air conditioner.

[0008] If the conditions for condensation generation are met, the stepper motor is powered on and locked. When the stepper motor is locked, its rotor is stationary.

[0009] In this embodiment, the formation of condensation is monitored by acquiring condensation-affecting parameters of the target device inside the air conditioner. When these parameters meet the conditions for condensation formation, the stepper motor is powered on and locked. The powered-on and locked stepper motor generates its own heat, increasing its temperature and making it less prone to condensation. This protects the stepper motor and prevents safety issues. Furthermore, since the target device is the air conditioner itself, auxiliary materials such as sponges or rubber blocks are unnecessary, reducing the material costs of the air conditioner.

[0010] In conjunction with the first aspect, in an optional implementation of the embodiments of this application, the method further includes:

[0011] The different target devices have different parameter types for their operating parameters, and different parameter types correspond to different condensation generation conditions.

[0012] By adopting this implementation method, the operating parameters of multiple target devices can be obtained. This allows for the use of different parameter types to determine whether it is necessary to control the stepper motor to power on and lock it. This helps to increase the probability of preventing condensation from forming on the stepper motor, thereby improving the protection effect of the stepper motor and reducing the probability of safety hazards from the stepper motor.

[0013] In conjunction with the first aspect, in one optional implementation of the embodiments of this application, the target device includes at least one of an air conditioner compressor, an air conditioner heat exchanger tube, and an air conditioner fan; the operating parameters of the compressor include operating frequency, the operating parameters of the heat exchanger tube include tube temperature, and the operating parameters of the fan include fan damper.

[0014] The method further includes:

[0015] If the operating frequency is greater than a preset frequency threshold and / or the pipe temperature is less than a preset temperature threshold and / or the windshield belongs to a preset windshield prone to condensation, then the operating parameters are determined to meet the condensation generation conditions.

[0016] Using this implementation method, the compressor frequency affects the cooling capacity and outlet air temperature. Condensation is more likely to occur when the operating frequency is greater than the frequency threshold, when the pipe temperature is less than the temperature threshold, and when the fan is a condensation-prone fan. Since the compressor, heat exchange pipe, and fan are all components of the air conditioner, the air conditioner can be judged to be prone to condensation by its operating parameters. No additional auxiliary materials are required, which reduces the material cost of the air conditioner.

[0017] In conjunction with the first aspect, in an optional implementation of the embodiments of this application, before the stepper motor is powered on and locked, the method further includes:

[0018] Obtain the operating status of the stepper motor.

[0019] If the operating state is "not running", then the stepper motor is powered on and locked.

[0020] If the operating status is "operating", then reacquire the operating parameters of the target device inside the air conditioner; or,

[0021] Before obtaining the condensation impact parameters of the air conditioner, the method further includes:

[0022] Obtain the operating status of the stepper motor.

[0023] If the operating status is not running, then the parameters affecting the condensation of the air conditioner will be obtained.

[0024] Using this implementation method, it is necessary to determine whether the stepper motor is in running state before controlling the stepper motor to power on and lock it. If it is in running state, the stepper motor is less likely to produce condensation, so there is no need to control the stepper motor to power on and lock it, so that the stepper motor can work normally and ensure the user experience of the air conditioner.

[0025] In conjunction with the first aspect, in one optional implementation of the embodiments of this application, the stepper motor is a stepper motor having multiple phases;

[0026] The method of controlling the stepper motor to power on and lock the stepper motor includes:

[0027] Control the stepper motor to power on a single phase.

[0028] Using this implementation method, the stepper motor can be locked by controlling the single-phase power-on of the stepper motor, and the control method is simple and convenient.

[0029] In conjunction with the first aspect, in one optional implementation of the embodiments of this application, the target device includes a first temperature and humidity sensor of an air conditioner or a second temperature and humidity sensor located in the same space as the air conditioner; the environmental parameters include a first temperature and / or a first humidity, and the environmental parameters include a second temperature and / or a second humidity;

[0030] The method further includes:

[0031] If the first temperature or the second temperature exceeds a preset first threshold, then it is determined that the condensation influencing parameters meet the condensation formation conditions.

[0032] And / or if the first humidity or the second humidity exceeds a preset second threshold, then it is determined that the condensation influence parameter meets the condensation water generation conditions;

[0033] When the first temperature and humidity sensor is installed in the air conditioner, the first temperature and / or the first humidity are obtained; when the first temperature and humidity sensor is not installed in the air conditioner, the air conditioner communicates with the second temperature and humidity sensor to obtain the second temperature and / or the second humidity.

[0034] Using this implementation method, it is also possible to determine whether an air conditioner is prone to condensation by temperature and humidity. When acquiring temperature and humidity data, if the air conditioner has a built-in temperature and humidity sensor, the first temperature and / or second temperature is obtained by using the first temperature and humidity sensor built into the air conditioner; otherwise, the second temperature and humidity sensor is used. This eliminates the need to add hardware structures such as temperature and humidity sensors to the air conditioner, thus reducing the cost of the air conditioner.

[0035] In conjunction with the first aspect, in an optional implementation of this application embodiment, before obtaining the condensation influence parameters of the air conditioner, the method further includes:

[0036] Obtain the operating mode of the air conditioner;

[0037] If the operating mode is cooling, then the step of obtaining the condensation impact parameters of the air conditioner is performed.

[0038] By adopting this implementation method, the operating parameters of the target device are only obtained when the operating mode is cooling, which helps to reduce the probability of locking the stepper motor.

[0039] In conjunction with the first aspect, in an optional implementation of the embodiments of this application, after the stepper motor is powered on and locked, the method further includes:

[0040] When the condensation influence parameters do not meet the condensation water generation conditions and the duration reaches a preset time threshold, the stepper motor is controlled to exit the locked state.

[0041] This implementation method facilitates timely exit from the stepper motor's locked state, ensuring the normal operation of the stepper motor.

[0042] According to a second aspect of the embodiments of this application, a cooling control method for an air conditioner is provided, wherein when the air conditioner is in cooling mode, the control method for the stepper motor used in the air conditioner described above is executed.

[0043] According to a third aspect of the embodiments of this application, an air conditioner is provided, which has a stepper motor protection program. When the air conditioner runs the stepper motor protection program, it adopts the control method for the stepper motor of the air conditioner described above.

[0044] The technical effects achieved by the second and third aspects mentioned above are similar to those achieved by the corresponding technical means in the first aspect, and will not be repeated here. Attached Figure Description

[0045] Figure 1 This is a flowchart of a control method for a stepper motor used in an air conditioner, provided in an embodiment of this application;

[0046] Figure 2 This is a schematic diagram of the energized phase of a stepper motor in use, provided in an embodiment of this application;

[0047] Figure 3 This is a flowchart illustrating a control method for a stepper motor used in air conditioning, as provided in an embodiment of this application, in a specific application. Detailed Implementation

[0048] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0049] It should be understood that "multiple" as mentioned herein refers to two or more. In the description of the embodiments of this application, unless otherwise stated, " / " means "or," for example, A / B can mean A or B; "and / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Furthermore, to facilitate a clear description of the technical solutions of the embodiments of this application, the terms "first," "second," etc., are used in the embodiments of this application to distinguish identical or similar items with essentially the same function and effect. Those skilled in the art will understand that the terms "first," "second," etc., do not limit the quantity or execution order, and the terms "first," "second," etc., do not necessarily imply differentness.

[0050] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0051] Air conditioners, as air conditioning devices, often have many moving parts or moving air guides for air distribution or other purposes. These moving structures are generally driven by stepper motors. In environments with high humidity, when the air conditioner is cooling, water vapor in the air often condenses in and around the air ducts, including on the stepper motors near the ducts. If condensation forms on the surface or even inside the stepper motor, it can cause corrosion, insulation failure, and even electrical safety problems. This application provides a control method specifically designed for the control of air conditioners and stepper motors, solving the problem of moisture absorption by the stepper motors inside the air conditioner due to condensation.

[0052] Based on this, embodiments of this application provide a control method for a stepper motor used in an air conditioner, a refrigeration control method for an air conditioner, and an air conditioner, which have at least the following characteristics:

[0053] When the preset control logic conditions are met, the stepper motor is locked with single-phase power. The heat generated by the stepper motor itself dissipates the moisture on its surface and inside, thus preventing moisture from getting in. This proposal does not require additional material costs for the air conditioner itself.

[0054] At least the following problems need to be addressed:

[0055] In the industry, the design for moisture protection of stepper motors inside air conditioners often involves adding extra auxiliary materials such as sponges, rubber blocks, and damping blocks around the stepper motor to seal and isolate the surrounding structure from cold air or to provide insulation. While these methods are effective to some extent, they have drawbacks, including increased material costs and very low production efficiency. Furthermore, in some extreme locations, conventional sealing and insulation methods are no longer sufficient to completely eliminate the risk of moisture absorption by condensate from the stepper motor. This is a common and difficult-to-eliminate problem in the design of air conditioning and other refrigeration equipment.

[0056] It has at least the following effects:

[0057] To address the moisture-proofing issue of stepper motors in air conditioners, an alternative approach is proposed: Without requiring additional auxiliary materials such as sponges, rubber blocks, or damping blocks, a special control method is designed for both the air conditioner and the stepper motor. When pre-set control logic conditions are met, the stepper motor is locked with single-phase power. The heat generated by the motor itself dissipates surface and internal moisture, effectively preventing moisture absorption. This method is significantly more effective than passive moisture-proofing methods such as sealing and insulation. Furthermore, this solution does not increase the material cost of the air conditioner itself, and compared to existing industry solutions, it offers superior cost control and production efficiency.

[0058] Next, a control method for a stepper motor for an air conditioner provided in the embodiments of this application will be further described, referring to... Figure 1 The flowchart shown is a control method for a stepper motor used in an air conditioner. The method includes the following processing steps.

[0059] S100: Obtain the condensation impact parameters of the air conditioner.

[0060] The condensation-influencing parameters include at least one of the operating parameters of the target components within the air conditioner and environmental parameters. The target components include those that influence the formation of condensate in the air conditioner. Specifically, target components refer to those that are present in the air conditioner at the factory, not those installed later, such as compressors, fans, and heat exchangers. A positive influence means that the use of the target components promotes condensation formation; for example, during air conditioning cooling, the compressor frequency and the tube temperature of the heat exchanger both contribute to condensation formation.

[0061] In one embodiment, operating parameters refer to the parameters of the target device during operation. Different target devices have different operating parameters. For example, when a compressor is the target device, the operating parameters may be the compressor's operating frequency, operating time, etc. When a heat exchanger is the target device, the operating parameters may be the heat exchanger's tube temperature, operating time, etc. This embodiment does not make specific limitations on these parameters.

[0062] S102. Determine whether the preset condensation water generation conditions are met based on the condensation influence parameters of the air conditioner.

[0063] S104. If the conditions for condensation generation are met, then power on the stepper motor and lock the stepper motor.

[0064] In one embodiment, the condensation formation condition is used to determine whether operating parameters will lead to condensation formation or whether condensation is easily formed. Therefore, the corresponding condensation formation condition will differ depending on the target device. For example, when a compressor is the target device, the operating parameters include the compressor's operating frequency. Experiments show that when the operating frequency is below a certain value, condensation will be generated or easily formed. In this case, the condensation formation condition corresponding to the compressor, or the condensation formation condition corresponding to the operating frequency, can be set to be below value A. If the obtained operating frequency is below value A, then it is determined that the operating parameters meet the condensation formation condition.

[0065] When the stepper motor is locked, its rotor is stationary. Specifically, locking the stepper motor can be achieved by controlling the power-on method. For example, for a multi-phase stepper motor, powering on only one phase will lock the motor, and in this state, the rotor will not rotate and will remain stationary.

[0066] In this embodiment, the formation of condensation is monitored by acquiring condensation-affecting parameters of the target device inside the air conditioner. When these parameters meet the conditions for condensation formation, the stepper motor is powered on and locked. The powered-on and locked stepper motor generates its own heat, increasing its temperature and making it less prone to condensation. This protects the stepper motor and prevents safety issues. Furthermore, since the target device is the air conditioner itself, auxiliary materials such as sponges or rubber blocks are unnecessary, reducing the material costs of the air conditioner.

[0067] In one possible embodiment of this application, the method further includes:

[0068] The different target devices have different parameter types for their operating parameters, and different parameter types correspond to different condensation generation conditions.

[0069] In one embodiment, multiple condensation generation conditions are preset, and different target devices correspond to different condensation generation conditions. For example, if the target devices include a compressor, a heat exchanger, and a fan, then the condensation generation conditions will at least include conditions corresponding to the compressor, heat exchanger, and fan respectively.

[0070] By adopting this implementation method, the operating parameters of multiple target devices can be obtained. This allows for the use of different parameter types to determine whether it is necessary to control the stepper motor to power on and lock it. This helps to increase the probability of preventing condensation from forming on the stepper motor, thereby improving the protection effect of the stepper motor and reducing the probability of safety hazards from the stepper motor.

[0071] Optionally, in one implementation of this embodiment, the target device includes at least one of an air conditioner compressor, an air conditioner heat exchanger tube, and an air conditioner fan; the operating parameters of the compressor include operating frequency, the operating parameters of the heat exchanger tube include tube temperature, and the operating parameters of the fan include fan speed.

[0072] The method further includes:

[0073] If the operating frequency is greater than a preset frequency threshold and / or the pipe temperature is less than a preset temperature threshold and / or the windshield belongs to a preset windshield prone to condensation, then the operating parameters are determined to meet the condensation generation conditions.

[0074] In other words, as long as one of the conditions is met, the operating parameters are determined to meet the conditions for condensation formation.

[0075] Specifically, the condensation formation condition corresponding to the operating frequency is whether it exceeds the frequency threshold; the condensation formation condition corresponding to the pipe temperature is whether it is below the temperature threshold; and the condensation formation condition corresponding to the windshield is whether it is a windshield prone to condensation. In particular, the fan has multiple windshields, and the fan speed varies under different windshields. When the windshield corresponding to a lower windshield has a lower wind speed, condensation is more likely to form. Therefore, a smaller windshield can be designated as a windshield prone to condensation.

[0076] Using this implementation method, the compressor frequency affects the cooling capacity and outlet air temperature. Condensation is more likely to occur when the operating frequency is greater than the frequency threshold, when the pipe temperature is less than the temperature threshold, and when the fan is a condensation-prone fan. Since the compressor, heat exchange pipe, and fan are all components of the air conditioner, the air conditioner can be judged to be prone to condensation by its operating parameters. No additional auxiliary materials are required, which reduces the material cost of the air conditioner.

[0077] Optionally, in one implementation of this embodiment, before powering on and locking the stepper motor, the method further includes:

[0078] Obtain the operating status of the stepper motor.

[0079] If the operating state is "not running", then the stepper motor is powered on and locked.

[0080] If the operating status is "operating", then reacquire the operating parameters of the target device inside the air conditioner; or,

[0081] Before obtaining the condensation impact parameters of the air conditioner, the method further includes:

[0082] Obtain the operating status of the stepper motor.

[0083] If the operating status is not running, then the parameters affecting the condensation of the air conditioner will be obtained.

[0084] In one embodiment, the operating state includes running and not running. The operating state can be determined by detecting whether the stepper motor is rotating or whether the stepper motor is powered on in multiple phases. For example, when the stepper motor has output torque or operating power, the operating state is running.

[0085] Using this implementation method, it is necessary to determine whether the stepper motor is in running state before controlling the stepper motor to power on and lock it. If it is in running state, the stepper motor is less likely to produce condensation, so there is no need to control the stepper motor to power on and lock it, so that the stepper motor can work normally and ensure the user experience of the air conditioner.

[0086] Optionally, in one implementation of this embodiment, the stepper motor is a stepper motor having multiple phases;

[0087] The method of controlling the stepper motor to power on and lock the stepper motor includes:

[0088] Control the stepper motor to power on a single phase.

[0089] In one embodiment, for example, the stepper motor includes four phases, namely phases A, B, C, and D. When the stepper motor is working normally, the four phases are generally energized in an eight-step cycle. When it is necessary to control the stepper motor to lock, only one phase (A, B, C, or D) is continuously energized individually.

[0090] Using this implementation method, the stepper motor can be locked by controlling the single-phase power-on of the stepper motor, and the control method is simple and convenient.

[0091] Optionally, in one implementation of this embodiment, the target device includes a first temperature and humidity sensor of an air conditioner or a second temperature and humidity sensor located in the same space as the air conditioner; the environmental parameters include a first temperature and / or a first humidity, and the environmental parameters include a second temperature and / or a second humidity;

[0092] The method further includes:

[0093] If the first temperature or the second temperature exceeds a preset first threshold, then the condensation influence parameter is determined to meet the condensation water formation conditions.

[0094] And / or if the first humidity or the second humidity exceeds a preset second threshold, then it is determined that the condensation influence parameter meets the condensation water generation conditions;

[0095] When the first temperature and humidity sensor is installed in the air conditioner, the first temperature and / or the first humidity are obtained; when the first temperature and humidity sensor is not installed in the air conditioner, the air conditioner communicates with the second temperature and humidity sensor to obtain the second temperature and / or the second humidity.

[0096] In one embodiment, the first temperature and humidity sensor is a temperature and humidity sensor that comes pre-installed with the air conditioner. If the air conditioner has a built-in temperature sensor, the temperature sensor can also be used to collect the first temperature. When the air conditioner does not have a sensor that can detect temperature and / or humidity, the second temperature and / or second humidity can be obtained from other devices in the room that have temperature and humidity detection functions.

[0097] Using this implementation method, it is also possible to determine whether an air conditioner is prone to condensation by temperature and humidity. When acquiring temperature and humidity data, if the air conditioner has a built-in temperature and humidity sensor, the first temperature and / or second temperature is obtained by using the first temperature and humidity sensor built into the air conditioner; otherwise, the second temperature and humidity sensor is used. This eliminates the need to add hardware structures such as temperature and humidity sensors to the air conditioner, thus reducing the cost of the air conditioner.

[0098] Optionally, in one implementation of this embodiment, before obtaining the condensation impact parameters of the air conditioner, the method further includes:

[0099] Obtain the operating mode of the air conditioner;

[0100] If the operating mode is cooling, then the step of obtaining the condensation impact parameters of the air conditioner is performed.

[0101] In one embodiment, the air conditioner's operating modes include heating, cooling, and dehumidification, etc., and this embodiment does not specifically limit these modes.

[0102] By adopting this implementation method, the operating parameters of the target device are only obtained when the operating mode is cooling, which helps to reduce the probability of locking the stepper motor.

[0103] Optionally, in one implementation of this embodiment, after the stepper motor is powered on and locked, the method further includes:

[0104] When the condensation influence parameters do not meet the condensation water generation conditions and the duration reaches a preset time threshold, the stepper motor is controlled to exit the locked state.

[0105] It should be noted that when there are multiple target devices, there are also multiple operating parameters. Therefore, if any operating parameter fails to meet the corresponding condensation generation conditions and the duration reaches the preset time threshold, the stepper motor will be released from the locked state. In other words, as long as any operating parameter meets the corresponding condensation generation conditions or the duration does not reach the time threshold, the stepper motor will remain locked.

[0106] This implementation method facilitates timely exit from the stepper motor's locked state, ensuring the normal operation of the stepper motor.

[0107] According to a second aspect of the embodiments of this application, a cooling control method for an air conditioner is provided, wherein when the air conditioner is in cooling mode, the control method for the stepper motor used in the air conditioner described above is executed.

[0108] According to a third aspect of the embodiments of this application, an air conditioner is provided, which has a stepper motor protection program. When the air conditioner runs the stepper motor protection program, it adopts the control method for the stepper motor of the air conditioner described above.

[0109] In the above embodiments of this application, the descriptions of each embodiment have their own emphasis. Parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments. The steps illustrated in the related flowcharts can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowcharts, in some cases, the steps shown or described may be performed in a different order than that shown here. In other words, the order of steps described in the foregoing embodiments is merely an example. Reasonable adjustments to the order of steps based on the content of the embodiments of this application are also within the protection scope of the embodiments of this application.

[0110] In one specific implementation of the embodiments of this application, the control method for the stepper motor of the air conditioner, the refrigeration control method of the air conditioner, and the air conditioner include the following processing steps:

[0111] I. Feasibility Analysis of the Solution: (e.g.) Figure 2 As shown, stepper motors used in air conditioners are typically four-phase, eight-step stepper motors. Assuming the four-phase windings of the stepper motor are A, B, C, and D, the normal power-on sequence is: A→AB→B→BA→A→AB→B→BA cycled power supply. If only one phase of the stepper motor is powered, it will only lock the motor, and the rotor will not rotate. The energized winding will continue to be energized and generate heat (locking is a normal characteristic of stepper motors; the temperature rise caused by this heat generation is within the normal operating range and will not affect the stepper motor's lifespan), and will not affect the original state of the driven motion mechanism.

[0112] II. Specific Implementation Plan:

[0113] 1. When the air conditioner is turned on, the control board obtains the current mode of the air conditioner. If it is in cooling mode, it collects real-time data on the main operating status that affect the formation of condensation in the air conditioner, including but not limited to compressor frequency f, indoor unit evaporator pipe temperature T, fan speed, ambient temperature, and ambient humidity (because most mainstream (mid-to-low-end) wall-mounted air conditioners on the market are not equipped with humidity sensors. If ambient humidity is used as a judgment condition, a humidity sensor needs to be added. However, this proposal mainly advocates solving the condensation problem of stepper motors without increasing material costs. Therefore, this article does not mention using a humidity sensor to measure ambient humidity to determine the conditions for entering single-phase power supply).

[0114] 2. When any of the preset conditions that are likely to cause condensation water are met (the compressor frequency f > the preset threshold f1 (the threshold is different for different models and is determined according to the actual matching situation. The compressor frequency mainly affects the overall cooling capacity and the outlet air temperature), the temperature value t of the evaporator tube of the indoor unit < t1 (the threshold is different for different models. The evaporator tube temperature is one of the main factors affecting the outlet air temperature), being in the condensation-prone air gear (generally the medium, low, and silent gears. When the evaporator tube temperature is the same, generally the lower the wind speed, the less cold air is dissipated, the lower the outlet air temperature, and the easier it is to form condensation water)), the controller obtains the working state of the stepper motor of the moving structure. If the stepper motor is currently in the running state, it continues to maintain the original state without any treatment (because heat is generated during the operation of the stepper motor itself, so temperature rise will not cause condensation of condensed water). If the stepper motor is in the stopped state, single-phase power supply is applied to the A phase (or any other phase) of the stepper motor (single-phase excitation of the stepper motor coil, and the stepper motor will not rotate, that is, the stepper motor is in the power-on locked state). At this time, the stepper motor is locked in place, and its internal coil will gradually generate heat due to power supply, resulting in the temperature of the stepper motor rising to a balance point (taking the common MP35 model stepper motor in air conditioners as an example, the balance temperature of the stepper motor during single-phase power supply is generally about 42 °C. Supplementary note: This balance point does not require logical control. Only single-phase power supply needs to be given to the stepper motor (because the inside of the stepper motor is a closed space, and the deviation of the temperature balance point is less affected by the ambient temperature), and its winding will naturally generate heat to reach the temperature point between 40 and 60 °C (specifically determined by the stepper motor model (common models include MP20 / 35 / 40 / 50 / 55 / 60, etc.). The winding impedance of different models is different, and the heat generation is different, resulting in some differences in the balance temperature. The above 42 °C is the data measured from the most common MP35 stepper motor in wall-mounted air conditioners on the market)). Because the dew point temperature of the condensation water during air conditioning refrigeration under high-temperature and high-humidity conditions is generally about 29 degrees or below 29 degrees, the temperature of the stepper motor is more than 10 degrees higher than the dew point temperature at this time, and no condensation water will form on its surface and inside, achieving the moisture-proof effect.

[0115] 3. After the stepper motor enters the single-phase energized state, the control system continues to collect the main data affecting the formation of condensate in the air conditioner, including but not limited to the compressor frequency f, the indoor unit evaporator pipe temperature T, and the fan speed. When the compressor frequency f, the indoor unit evaporator pipe temperature T, and the fan speed change, the holding times t1, t2, and t3 after the switching states of the compressor frequency f, the indoor unit evaporator pipe temperature T, and the fan speed are recorded respectively. If the following conditions are met simultaneously: F < threshold f1, and holding time t1 ≥ preset threshold tf; T > threshold T1, and holding time t2 ≥ preset threshold tT; and the holding time t3 is ≥ preset threshold tD ​​when the fan is in the non-condensation-prone setting, then the controller determines that it is in a non-condensation-prone state, and the controller cuts off the single-phase energized circuit of the stepper motor, restoring the stepper motor to its original stopped state.

[0116] The above provides illustrative examples of the method embodiments according to this application.

[0117] The sequence numbers or order of description of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0118] 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.

[0119] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, 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 according to actual needs.

[0120] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0121] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer, or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., digital versatile disc (DVD)), or a semiconductor medium (e.g., solid state disk (SSD)). It is worth noting that the computer-readable storage medium mentioned in the embodiments of this application can be a non-volatile storage medium; in other words, it can be a non-transient storage medium.

[0122] It should be noted that the information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data used for analysis, stored data, displayed data, etc.), and signals involved in the embodiments of this application are all authorized by the user or fully authorized by all parties, and the collection, use, and processing of related data must comply with the relevant laws, regulations, and standards of the relevant countries and regions. For example, the scene data of the current frame in the 3D virtual scene involved in the embodiments of this application, the client's device information, and the scene interaction information are all obtained with full authorization.

[0123] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A control method for a stepper motor used in air conditioning, characterized in that, The method includes: Obtain the condensation-affecting parameters of the air conditioner, wherein the condensation-affecting parameters include the operating parameters of the target devices inside the air conditioner, and the target devices include devices that affect the formation of condensate in the air conditioner; Determine whether the preset condensation formation conditions are met based on the condensation impact parameters of the air conditioner. If the conditions for condensation generation are met, the stepper motor is powered on and locked. When the stepper motor is locked, the rotor of the stepper motor is stationary. The target device includes at least one of an air conditioner compressor, an air conditioner heat exchanger tube, and an air conditioner fan; the operating parameters of the compressor include operating frequency, the operating parameters of the heat exchanger tube include tube temperature, and the operating parameters of the fan include fan damper. The method further includes: If the operating frequency is greater than a preset frequency threshold and / or the pipe temperature is less than a preset temperature threshold and / or the windshield belongs to a preset windshield prone to condensation, then the operating parameters are determined to meet the condensation generation conditions.

2. The control method for a stepper motor for air conditioning according to claim 1, characterized in that, The method further includes: The different target devices have different parameter types for their operating parameters, and different parameter types correspond to different condensation generation conditions.

3. The control method for a stepper motor for air conditioning according to claim 1, characterized in that, Before powering on and locking the stepper motor, the method further includes: Obtain the operating status of the stepper motor. If the operating state is "not running", then the stepper motor is powered on and locked. If the operating status is "operating", then reacquire the operating parameters of the target device inside the air conditioner; or, Before obtaining the condensation impact parameters of the air conditioner, the method further includes: Obtain the operating status of the stepper motor. If the operating status is not running, then the parameters affecting the condensation of the air conditioner will be obtained.

4. The control method for a stepper motor for air conditioning according to claim 1, characterized in that, The stepper motor is a stepper motor with multiple phases; The method of controlling the stepper motor to power on and lock the stepper motor includes: Control the stepper motor to power on a single phase.

5. The control method for a stepper motor for air conditioning according to claim 1, characterized in that, The condensation-affecting parameters also include environmental parameters, in which case the target device includes a first temperature and humidity sensor of the air conditioner or a second temperature and humidity sensor located in the same space as the air conditioner; the environmental parameters include a first temperature and / or a first humidity, and the environmental parameters include a second temperature and / or a second humidity; The method further includes: If the first temperature or the second temperature exceeds a preset first threshold, then the condensation influence parameter is determined to meet the condensation water formation conditions. And / or if the first humidity or the second humidity exceeds a preset second threshold, then it is determined that the condensation influence parameter meets the condensation water generation conditions; When the first temperature and humidity sensor is installed in the air conditioner, the first temperature and / or the first humidity are obtained; when the first temperature and humidity sensor is not installed in the air conditioner, the air conditioner communicates with the second temperature and humidity sensor to obtain the second temperature and / or the second humidity.

6. The control method for a stepper motor for air conditioning according to any one of claims 1-5, characterized in that, Before obtaining the condensation impact parameters of the air conditioner, the method further includes: Obtain the operating mode of the air conditioner; If the operating mode is cooling, then the step of obtaining the condensation impact parameters of the air conditioner is performed.

7. The control method for a stepper motor for air conditioning according to any one of claims 1-5, characterized in that, After the stepper motor is powered on and locked, the method further includes: When the condensation influence parameters do not meet the condensation water generation conditions and the duration reaches a preset time threshold, the stepper motor is controlled to exit the locked state.

8. A cooling control method for an air conditioner, characterized in that, When the air conditioner is in cooling mode, the control method for the stepper motor of the air conditioner according to any one of claims 1-7 is executed.

9. An air conditioner, characterized in that, The air conditioner has a stepper motor protection program, and when the stepper motor protection program is running, the air conditioner uses the control method for the stepper motor of the air conditioner as described in any one of claims 1-7.

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