Control method of stepping motor for air conditioner, refrigeration control method of air conditioner and air conditioner

Abstract

The embodiment of the invention discloses a control method of a stepping motor for an air conditioner, a refrigeration control method of the air conditioner and the air conditioner, and belongs to the field of electrical equipment control. The control method of the stepping motor for the air conditioner comprises the steps that operation parameters of target devices in the air conditioner are obtained, and the target devices comprise devices which have positive influences on formation of air conditioner condensation water; if the operation parameters meet the preset condensation water generation condition, a stepping motor is controlled to be powered on and locked, and when the stepping motor is locked, a rotor of the stepping motor is in a static state. According to the embodiment of the invention, when the operation parameters meet the condensation water generation conditions, the stepping motor is controlled to be powered on and locked, the powered-on and locked stepping motor is heated, the temperature of the stepping motor is increased, condensation water is not prone to appearing on the stepping motor, and therefore the stepping motor is protected, and the safety problem of the stepping motor is avoided.

Description

Technical Field

[0001] The present application relates to the field of electrical equipment control, and in particular, to a control method of a stepper motor for an air conditioner, a refrigeration control method of an air conditioner, and an air conditioner. Background Art

[0002] As an air conditioner, air conditioners often have many moving parts or moving air guides for air distribution or other purposes. These moving structures are generally driven by stepper motors. When the air humidity in the operating environment is high, when the air conditioner is cooling, a lot of condensation water will often form in and around the air duct because the water vapor in the air is cooled, including the stepper motor near the air duct. If condensation water forms on the surface of the stepper motor or even inside it, it will cause the stepper motor to get damp, resulting in rust, insulation failure, and even electrical safety problems.

[0003] The industry's design for moisture-proofing the stepper motor inside the air conditioner often adds some additional auxiliary materials such as sponges, rubber blocks, damping blocks, etc. around the stepper motor to seal the surrounding structure to isolate the cold air or keep it warm in order to achieve the purpose of moisture-proofing the stepper motor. However, the auxiliary materials are not only easy to damage, but also require regular maintenance, which increases the material cost of the air conditioner. Summary of the invention

[0004] The embodiments of the present application provide a control method for a stepper motor for an air conditioner, a refrigeration control method for an air conditioner, and an air conditioner, so as to at least solve the technical problem of high material cost of the air conditioner.

[0005] According to a first aspect of an embodiment of the present application, a method for controlling a stepping motor for an air conditioner is provided, the method comprising:

[0006] Acquire a condensation influence parameter of the air conditioner, wherein the condensation influence parameter includes at least one of an operating parameter and an environmental parameter of a target device in the air conditioner, wherein the target device includes a device that has an influence on the formation of condensation water of the air conditioner;

[0007] Determine whether the preset condensation water generation conditions are met according to the condensation influence parameters of the air conditioner;

[0008] If the condensation water generation condition is met, the stepper motor is controlled to be powered on and locked, wherein when the stepper motor is locked, the rotor of the stepper motor is in a stationary state.

[0009] By adopting this embodiment, the formation of condensation water is monitored by obtaining the condensation influence parameters of the target device in the air conditioner, so that when the condensation influence parameters meet the condensation water generation conditions, the stepper motor is controlled to be powered on and locked, and the powered and locked stepper motor itself heats up, and the temperature of the stepper motor rises, making it difficult for condensation water to appear on the stepper motor, thereby protecting the stepper motor and avoiding safety problems of the stepper motor. At the same time, since the target device of the air conditioner is used, there is no need to set auxiliary materials such as sponges and rubber blocks, which reduces the material cost of the air conditioner.

[0010] In combination with the first aspect, in an optional implementation manner of the embodiment of the present application, the method further includes:

[0011] The operating parameters corresponding to different target devices have different parameter types, and the operating parameters of different parameter types correspond to different condensation water generation conditions.

[0012] By adopting this implementation method, the operating parameters of multiple target devices can be obtained, so that operating parameters of different parameter types can be used to determine whether it is necessary to control the stepper motor to power on and lock it, which is beneficial to increase the probability of preventing condensation from occurring in the stepper motor, thereby improving the protection effect on the stepper motor and reducing the probability of safety hazards in the stepper motor.

[0013] In combination with the first aspect, in an optional implementation of the embodiment of the present application, the target device includes at least one of a compressor of an air conditioner, a heat exchange tube of a heat exchanger of the air conditioner, and a fan of the air conditioner; the operating parameters of the compressor include an operating frequency, the operating parameters of the heat exchange tube include a tube temperature, and the operating parameters of the fan include a windshield;

[0014] The method further comprises:

[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 is a preset easy-condensation windshield, it is determined that the operating parameters meet the condensation water generation conditions.

[0016] By adopting this implementation method, the frequency of the compressor will affect the cooling capacity and the outlet air temperature, so that condensation water is easily generated when the operating frequency is greater than the frequency threshold, condensation water is easily generated when the pipe temperature is lower than the temperature threshold, and condensation water is easily generated when the windshield is a condensation-prone windshield. Since the compressor, heat exchange tubes and fans are all built-in components of the air conditioner, whether the air conditioner is prone to condensation water can be judged by their operating parameters, without the need to add auxiliary materials, thereby reducing the material cost of the air conditioner.

[0017] In combination with the first aspect, in an optional implementation of the embodiment of the present application, before controlling the stepper motor to power on and locking the stepper motor, the method further includes:

[0018] Obtaining the operating status of the stepper motor,

[0019] If the running state is not running, the stepping motor is powered on and locked.

[0020] If the operating state is running, reacquiring the operating parameters of the target device in the air conditioner; or,

[0021] Before obtaining the condensation influence parameter of the air conditioner, the method further includes:

[0022] Obtaining the operating status of the stepper motor,

[0023] If the operating state is not operating, obtaining the condensation influence parameter of the air conditioner is performed.

[0024] When using this implementation method, it is necessary to control the stepper motor to power on and lock it before first determining whether the stepper motor is in operation. If it is in operation, the stepper motor is not likely to produce condensation water. Therefore, 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 combination with the first aspect, in an optional implementation of the embodiment of the present application, the stepper motor is a stepper motor with multiple phases;

[0026] The controlling the stepper motor to power on and locking the stepper motor comprises:

[0027] Control the single-phase power-on of the stepper motor.

[0028] By adopting this implementation method, the single-phase power-on of the stepper motor is controlled to achieve locking of the stepper motor, and the control method is simple and convenient.

[0029] In combination with the first aspect, in an optional implementation of the embodiment of the present application, the target device includes a first temperature and humidity sensor of the air conditioner or a second temperature and humidity sensor in the same space as the air conditioner; the environmental parameter includes a first temperature and / or a first humidity, and the environmental parameter includes a second temperature and / or a second humidity;

[0030] The method further comprises:

[0031] If the first temperature or the second temperature exceeds a preset first threshold, it is determined that the condensation influencing parameter meets the condensation water generation condition.

[0032] and / or if the first humidity or the second humidity exceeds a preset second threshold, determining that the condensation influencing parameter meets the condensation water generation condition;

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

[0034] By adopting this implementation method, it is also possible to determine whether the air conditioner is prone to condensation through temperature and humidity. When obtaining temperature and humidity data, if the air conditioner is equipped with a temperature and humidity sensor, the first temperature and / or second temperature is obtained by using the first temperature and humidity sensor of the air conditioner. Otherwise, the second temperature and humidity sensor is used. There is no need to add hardware structures such as temperature and humidity sensors to the air conditioner, thereby reducing the cost of the air conditioner.

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

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

[0037] If the operation mode is cooling, the step of obtaining the condensation influence parameter of the air conditioner is performed.

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

[0039] In combination with the first aspect, in an optional implementation of the embodiment of the present application, after controlling the stepper motor to power on and locking the stepper motor, the method further includes:

[0040] When the condensation influencing parameter does not meet the condensation water generation condition and the duration reaches a preset time threshold, the stepping motor is controlled to exit the locked state.

[0041] The implementation method is adopted to help exit the locked state of the stepper motor in time and ensure the normal use of the stepper motor.

[0042] According to a second aspect of an embodiment of the present application, a cooling control method for an air conditioner is provided. When the air conditioner is in a cooling mode, the above-mentioned control method for a stepper motor for an air conditioner is executed.

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

[0044] The technical effects obtained by the above-mentioned second to third aspects are similar to the technical effects obtained by the corresponding technical means in the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 is a flow chart of a control method for a stepper motor for an air conditioner provided in an embodiment of the present application;

[0046] Figure 2 is a schematic diagram of the energized phases of a stepper motor provided in an embodiment of the present application when in use;

[0047] Figure 3 It is a flow chart of a control method for a stepper motor for an air conditioner in a specific application provided in an embodiment of the present application. DETAILED DESCRIPTION

[0048] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0049] It should be understood that the "plurality" mentioned in this article refers to two or more. In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in order to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first", "second" and so on are used to distinguish between the same items or similar items with basically the same functions and effects. Those skilled in the art can understand that the words "first", "second" and so on do not limit the quantity and execution order, and the words "first", "second" and so on do not limit certain different

[0050] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, product, or apparatus.

[0051] As an air conditioner, an air conditioner often has many moving parts or moving air guide plates for the purpose of distributing air or for other purposes. These moving structures are generally driven by stepper motors. When the air humidity in the operating environment is high, when the air conditioner is cooling, a lot of condensation water will often form in and around the air duct because the water vapor in the air is cooled, including the stepper motor near the air duct. If condensation water forms on the surface of the stepper motor or even inside it, the stepper motor will be damp, causing rust, insulation failure, and even electrical safety problems. The present application provides a control method that is specially designed for the control method of air conditioners and stepper motors, solving the problem of the stepper motor inside the air conditioner getting damp due to condensation water.

[0052] Based on this, the embodiments of the present application provide a control method of a stepper motor for an air conditioner, a refrigeration control method of 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 single-phase powered and locked, and the heat generated by the stepper motor itself dissipates the water vapor on its surface and inside to prevent moisture. This proposal does not require additional material costs for the air conditioner body.

[0054] At least solve the following problems:

[0055] The industry's design for moisture-proofing of stepper motors inside air conditioners often involves adding some additional auxiliary materials such as sponges, rubber blocks, damping blocks, etc. near the stepper motors to seal and isolate the surrounding structures from cold air or keep them warm so as to achieve the purpose of moisture-proofing the stepper motors. Although these methods have certain effects, their disadvantages are that they not only increase material costs, but also have very low production efficiency. In addition, for some more extreme locations, conventional sealing and insulation can no longer completely solve the hidden dangers of condensation water in stepper motors becoming damp, which is a common and difficult-to-eliminate problem in the design of refrigeration equipment such as air conditioners.

[0056] At least the following effects:

[0057] In order to solve the moisture-proof problem of the stepper motor of the air conditioner, another idea is provided: without adding auxiliary materials such as sponge, rubber block, damping block, etc., the control method of the air conditioner and the stepper motor is specially designed. When the preset control logic conditions are met, the stepper motor is single-phase powered on and locked, and the heat generated by the stepper motor itself dissipates the water vapor on its surface and inside to prevent moisture, and the effect is obviously better than passive moisture-proof methods such as sealing, thermal insulation, etc. In addition, this solution does not increase the material cost of the air conditioner body. Compared with existing solutions in the industry, cost control and production efficiency are better.

[0058] Next, a control method for a stepper motor for an air conditioner provided in an embodiment of the present application is further described. Figure 1 The flowchart of the control method of the stepping motor for air conditioner shown in the figure includes the following processing procedures.

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

[0060] The condensation influencing parameters include at least one of the operating parameters and environmental parameters of the target device in the air conditioner. Among them, the target device includes a device that has an impact on the formation of condensation water in the air conditioner. Specifically, the target device refers to the device that comes with the air conditioner when it leaves the factory, rather than the device installed in the air conditioner later, such as a compressor, fan, heat exchanger, etc. The so-called positive impact means that when the target device is used, it will promote the formation of condensation water. For example, when the air conditioner is cooling, the frequency of the compressor will cause condensation water to be generated, and the pipe temperature of the heat exchanger will also cause condensation water to be generated.

[0061] In one embodiment, the operating parameters refer to the parameters of the target device when it is running, and different target devices have different corresponding operating parameters. For example, when a compressor is used as the target device, the operating parameters may be the operating frequency and operating time of the compressor, and when a heat exchanger is used as the target device, the operating parameters may be the pipe temperature and operating time of the heat exchanger, etc. This embodiment does not specifically limit this.

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

[0063] S104: If the condensation water generation condition is met, the stepper motor is controlled to be powered on and locked.

[0064] In one embodiment, the condensation water generation condition is used to determine whether the operating parameters will cause the generation of condensation water or whether condensation water is easily generated. Therefore, when the target device is different, the corresponding condensation water generation condition is also different. For example, when the compressor is used as the target device, the operating parameters include the operating frequency of the compressor. Through experiments, it is found that when the operating frequency is lower than a certain value, condensation water will be generated or condensation water will be easily generated. At this time, the condensation water generation condition corresponding to the compressor or the condensation water generation condition corresponding to the operating frequency can be set to be lower than the A value. If the obtained operating frequency is lower than the A value, it is determined that the operating parameters meet the condensation water generation condition.

[0065] When the stepper motor is locked, the rotor of the stepper motor is in a stationary state. Specifically, the stepper motor can be locked by controlling the power-on mode of the stepper motor. For example, for a multi-phase stepper motor, only a single phase of the stepper motor is powered on, and the stepper motor will enter a locked state. When locked, the rotor of the stepper motor will not rotate, and is therefore in a stationary state.

[0066] By adopting this embodiment, the formation of condensation water is monitored by obtaining the condensation influence parameters of the target device in the air conditioner, so that when the condensation influence parameters meet the condensation water generation conditions, the stepper motor is controlled to be powered on and locked, and the powered and locked stepper motor itself heats up, and the temperature of the stepper motor rises, making it difficult for condensation water to appear on the stepper motor, thereby protecting the stepper motor and avoiding safety problems of the stepper motor. At the same time, since the target device of the air conditioner is used, there is no need to set auxiliary materials such as sponges and rubber blocks, which reduces the material cost of the air conditioner.

[0067] In a possible embodiment of the present application, the method further includes:

[0068] The operating parameters corresponding to different target devices have different parameter types, and the operating parameters of different parameter types correspond to different condensation water generation conditions.

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

[0070] By adopting this implementation method, the operating parameters of multiple target devices can be obtained, so that operating parameters of different parameter types can be used to determine whether it is necessary to control the stepper motor to power on and lock it, which is beneficial to increase the probability of preventing condensation from occurring in the stepper motor, thereby improving the protection effect on the stepper motor and reducing the probability of safety hazards in the stepper motor.

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

[0072] The method further comprises:

[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 is a preset easy-condensation windshield, it is determined that the operating parameters meet the condensation water generation conditions.

[0074] That is to say, as long as one of the conditions is met, it is determined that the operating parameters meet the conditions for condensation water generation.

[0075] Among them, the condensation water generation condition corresponding to the operating frequency is whether it is greater than the frequency threshold, the condensation water generation condition corresponding to the pipe temperature is whether it is less than the temperature threshold, and the condensation water generation condition corresponding to the windshield is whether it is a windshield prone to condensation. Specifically, the fan has multiple windshields, and the fan speeds under different windshields are different. When the wind speed corresponding to the windshield is small, condensation water is easy to form, so the smaller windshield can be used as a windshield prone to condensation.

[0076] By adopting this implementation method, the frequency of the compressor will affect the cooling capacity and the outlet air temperature, so that condensation water is easily generated when the operating frequency is greater than the frequency threshold, condensation water is easily generated when the pipe temperature is lower than the temperature threshold, and condensation water is easily generated when the windshield is a condensation-prone windshield. Since the compressor, heat exchange tubes and fans are all built-in components of the air conditioner, whether the air conditioner is prone to condensation water can be judged by their operating parameters, without the need to add auxiliary materials, thereby reducing the material cost of the air conditioner.

[0077] Optionally, in an implementation of this embodiment, before controlling the stepper motor to power on and locking the stepper motor, the method further includes:

[0078] Obtaining the operating status of the stepper motor,

[0079] If the running state is not running, the stepping motor is powered on and locked.

[0080] If the operating state is running, reacquiring the operating parameters of the target device in the air conditioner; or,

[0081] Before obtaining the condensation influence parameter of the air conditioner, the method further includes:

[0082] Obtaining the operating status of the stepper motor,

[0083] If the operating state is not operating, obtaining the condensation influence parameter of the air conditioner is performed.

[0084] In one embodiment, the operating status includes operating and not operating. When obtaining the operating status, the operating status 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 working power, the operating status is operating.

[0085] When using this implementation method, it is necessary to control the stepper motor to power on and lock it before first determining whether the stepper motor is in operation. If it is in operation, the stepper motor is not likely to produce condensation water. Therefore, 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 an implementation of this embodiment, the stepper motor is a stepper motor with multiple phases;

[0087] The controlling the stepper motor to power on and locking the stepper motor comprises:

[0088] Control the single-phase power-on of the stepper motor.

[0089] In one embodiment, for example, the stepper motor includes four phases, namely A, B, C and D phases. When the stepper motor works normally, the four phases are generally energized in an eight-beat cycle. When the stepper motor needs to be locked, only any one of the A phase, B phase, C phase and D phase is continuously powered.

[0090] By adopting this implementation method, the single-phase power-on of the stepper motor is controlled to achieve locking of the stepper motor, and the control method is simple and convenient.

[0091] Optionally, in an 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 in the same space as the air conditioner; the environmental parameter includes a first temperature and / or a first humidity, and the environmental parameter includes a second temperature and / or a second humidity;

[0092] The method further comprises:

[0093] If the first temperature or the second temperature exceeds a preset first threshold, it is determined that the condensation influencing parameter meets the condensation water generation condition.

[0094] and / or if the first humidity or the second humidity exceeds a preset second threshold, determining that the condensation influencing parameter meets the condensation water generation condition;

[0095] When the first temperature and humidity sensor is provided in the air conditioner, the first temperature and / or the first humidity are obtained; when the first temperature and humidity sensor is not provided in the air conditioner, the second temperature and humidity sensor is communicated with 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 with the air conditioner when it leaves the factory. If the air conditioner comes with a temperature sensing package, the temperature sensing package can also be used to collect the first temperature. When the air conditioner is not provided with a sensor capable of detecting temperature and / or humidity, the second temperature and / or second humidity collected by other indoor devices with temperature and humidity detection functions can be obtained.

[0097] By adopting this implementation method, it is also possible to determine whether the air conditioner is prone to condensation through temperature and humidity. When obtaining temperature and humidity data, if the air conditioner is equipped with a temperature and humidity sensor, the first temperature and / or second temperature is obtained by using the first temperature and humidity sensor of the air conditioner. Otherwise, the second temperature and humidity sensor is used. There is no need to add hardware structures such as temperature and humidity sensors to the air conditioner, thereby reducing the cost of the air conditioner.

[0098] Optionally, in an implementation of this embodiment, before obtaining the condensation influence parameter of the air conditioner, the method further includes:

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

[0100] If the operation mode is cooling, the step of obtaining the condensation influence parameter of the air conditioner is performed.

[0101] In one embodiment, the operation modes of the air conditioner include heating, cooling, dehumidification, etc., which are not specifically limited in this embodiment.

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

[0103] Optionally, in an implementation of this embodiment, after controlling the stepper motor to power on and locking the stepper motor, the method further includes:

[0104] When the condensation influencing parameter does not meet the condensation water generation condition and the duration reaches a preset time threshold, the stepping motor is controlled to exit the locked state.

[0105] It should be noted that when there are multiple target devices, since there are also multiple operating parameters, when each operating parameter does not meet the corresponding condensation water generation condition and the duration reaches the preset time threshold, the stepper motor is controlled to exit the lock. In other words, as long as one operating parameter meets the corresponding condensation water generation condition or the duration does not reach the time threshold, the stepper motor remains locked.

[0106] The implementation method is adopted to help exit the locked state of the stepper motor in time and ensure the normal use of the stepper motor.

[0107] According to a second aspect of an embodiment of the present application, a cooling control method for an air conditioner is provided. When the air conditioner is in a cooling mode, the above-mentioned control method for a stepper motor for an air conditioner is executed.

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

[0109] In the above-mentioned embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments. The steps shown in the relevant flow chart can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flow chart, in some cases, the steps shown or described can be executed in an order different from that here. In other words, the order of steps described in the foregoing embodiments is only an example, and it is also within the scope of protection of the embodiments of the present application to reasonably adjust the order of steps based on the content of the embodiments of the present application.

[0110] In a specific implementation of the embodiment of the present application, a control method for a stepper motor for an air conditioner, a refrigeration control method for an air conditioner, and an air conditioner include the following processing procedures:

[0111] 1. Feasibility analysis of the implementation plan: Figure 2 As shown, the stepper motor for air conditioner is usually a four-phase eight-beat stepper motor. Assuming that the four-phase winding of the stepper motor is A, B, C, and D phases, the power-on sequence of the stepper motor in normal use is four-phase eight-beat: A→AB→B→BA-→A-→AB-→B-→BA cycle power-on. If the stepper motor is powered on in a single phase, it will only be powered on and locked, the stepper motor rotor will not rotate, and the powered winding will continue to be excited and generate heat (stepper motor locking is one of its normal characteristics, and the temperature rise caused by its heat generation is within the normal working range and will not affect the life of the stepper motor), without affecting the original state of the motion mechanism it drives.

[0112] 2. Specific implementation plan:

[0113] 1. The air conditioner is turned on and running. The control panel obtains the current mode of the air conditioner. If it is in cooling mode, the main operating status real-time data that affects the formation of condensation water of the air conditioner is collected in real time: including but not limited to the compressor frequency f, the internal evaporator tube temperature T, and the wind speed gear, ambient temperature, and ambient humidity (because the mainstream (medium and low-end) wall-mounted air conditioners on the market are not equipped with humidity sensors. If the ambient humidity is used as a judgment condition, a humidity sensor needs to be added. This proposal mainly advocates solving the condensation problem of stepper motors by not increasing material costs. Therefore, this article does not mention the use of humidity sensors to measure the ambient humidity to determine the conditions for entering single-phase power-on), etc.;

[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 varies 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 pipe in the indoor unit < t1 (the threshold varies for different models. The evaporator pipe temperature is one of the main factors affecting the outlet air temperature), being in the condensation-prone air duct (generally the medium, low, and silent gears. When the evaporator pipe temperature is the same, generally the lower the wind speed, the less cold air is dispersed, the lower the outlet air temperature, and the easier it is to form condensation water)), the controller obtains the working state of the stepping motor of the moving structure. If the stepping motor is currently in the running state, it continues to maintain the original state without any processing (because heat is generated during the operation of the stepping motor itself, resulting in a temperature rise and no condensation water will form). If the stepping motor is in the stopped state, the stepping motor is energized with single-phase power supply for phase A (or any other phase) (the stepping motor coil is single-phase excited, and the stepping motor will not rotate, that is, the stepping motor is in the power-on locked state). At this time, the stepping motor is locked in place, and its internal coil will gradually generate heat due to the power supply, causing the temperature of the stepping motor to rise to an equilibrium point (taking the commonly used MP35 model stepping motor in air conditioners as an example, the equilibrium temperature of the stepping motor during single-phase power supply is generally around 42°C. Supplementary explanation: This equilibrium point does not require logical control. Only the stepping motor needs to be supplied with single-phase power (because the inside of the stepping motor is a closed space, and the deviation of the temperature equilibrium point is less affected by the ambient temperature), and its winding will naturally generate heat to reach a temperature point between 40 and 60°C (specifically determined by the stepping motor model (commonly available models include MP20 / 35 / 40 / 50 / 55 / 60, etc.). Different models have different winding impedances and different heat generation amounts, resulting in slightly different equilibrium temperatures. The above 42°C is the data measured for the most common MP35 stepping 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 around 29 degrees or below 29 degrees, the temperature of the stepping 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 power-on state, the control system continues to collect the main data that affects the formation of condensation water in the air conditioner: including but not limited to the compressor frequency f, the indoor evaporator tube temperature T, and the wind speed gear, etc. When the compressor frequency f, the indoor evaporator tube temperature T, and the wind speed gear change, the holding time t1, t2, and t3 after the compressor frequency f, the indoor evaporator tube temperature T, and the wind speed gear are recorded respectively. If at the same time: F < threshold f1, and the holding time t1 ≥ preset threshold tf; T > threshold T1 and the holding time t2 ≥ preset threshold tT; in the non-condensation-prone windshield and the holding time t3 ≥ preset threshold tD, the controller determines that it is in the non-condensation-prone state, and the controller controls to cut off the single-phase power-on circuit of the stepper motor and restore the stepper motor to its original stop state.

[0116] The method embodiments according to the present application are described above by way of example.

[0117] The sequence of serial numbers or introduction of the embodiments of the present application is for description only and does 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. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0119] 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 units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0120] In addition, each functional unit in each embodiment of the present application 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.

[0121] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of 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, the process or function described in the embodiment of the present application is generated in whole or in part. 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 computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access, or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a digital versatile disc (DVD)), or a semiconductor medium (e.g., a solid state disk (SSD)). It is worth noting that the computer-readable storage medium mentioned in the embodiment of the present application may be a non-volatile storage medium, in other words, 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 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 relevant 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 three-dimensional virtual scene, the device information of the client, and the scene interaction information involved in the embodiments of this application are all obtained with full authorization.

[0123] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A control method for a stepping motor for an air conditioner, characterized in that: The method comprises: Acquire a condensation influence parameter of the air conditioner, wherein the condensation influence parameter includes at least one of an operating parameter and an environmental parameter of a target device in the air conditioner, wherein the target device includes a device that has an influence on the formation of condensation water of the air conditioner; Determine whether the preset condensation water generation conditions are met according to the condensation influence parameters of the air conditioner; If the condensation water generation condition is met, the stepper motor is controlled to be powered on and locked, wherein when the stepper motor is locked, the rotor of the stepper motor is in a stationary state.

2. The control method of the stepping motor for air conditioner according to claim 1, characterized in that: The method further comprises: The operating parameters corresponding to different target devices have different parameter types, and the operating parameters of different parameter types correspond to different condensation water generation conditions.

3. The control method of the stepping motor for air conditioner according to claim 2, characterized in that: The target device includes at least one of a compressor of an air conditioner, a heat exchange tube of a heat exchanger of the air conditioner, and a fan of the air conditioner; the operating parameters of the compressor include an operating frequency, the operating parameters of the heat exchange tube include a tube temperature, and the operating parameters of the fan include a windshield; The method further comprises: 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 is a preset easy-condensation windshield, it is determined that the operating parameters meet the condensation water generation conditions.

4. The control method of a stepping motor for an air conditioner according to claim 1, characterized in that: Before controlling the stepper motor to power on and lock the stepper motor, the method further includes: Obtaining the operating status of the stepper motor, If the running state is not running, the stepping motor is powered on and locked. If the operating state is running, reacquiring the operating parameters of the target device in the air conditioner; or, Before obtaining the condensation influence parameter of the air conditioner, the method further includes: Obtaining the operating status of the stepper motor, If the operating state is not operating, obtaining the condensation influence parameter of the air conditioner is performed.

5. The control method of a stepping motor for an air conditioner according to claim 1, characterized in that: The stepper motor is a stepper motor with multiple phases; The controlling the stepper motor to power on and locking the stepper motor comprises: Control the single-phase power-on of the stepper motor.

6. The control method of a stepping motor for an air conditioner according to claim 1, characterized in that: The target device includes a first temperature and humidity sensor of the air conditioner or a second temperature and humidity sensor in the same space as the air conditioner; the environmental parameter includes a first temperature and / or a first humidity, and the environmental parameter includes a second temperature and / or a second humidity; The method further comprises: If the first temperature or the second temperature exceeds a preset first threshold, it is determined that the condensation influencing parameter meets the condensation water generation condition. and / or if the first humidity or the second humidity exceeds a preset second threshold, determining that the condensation influencing parameter meets the condensation water generation condition; When the first temperature and humidity sensor is provided in the air conditioner, the first temperature and / or the first humidity are obtained; when the first temperature and humidity sensor is not provided in the air conditioner, the second temperature and humidity sensor is communicated with to obtain the second temperature and / or the second humidity.

7. The control method of a stepping motor for an air conditioner according to any one of claims 1 to 6, characterized in that: Before obtaining the condensation influence parameter of the air conditioner, the method further includes: Acquire the operating mode of the air conditioner; If the operation mode is cooling, the step of obtaining the condensation influence parameter of the air conditioner is performed.

8. The control method of a stepping motor for an air conditioner according to any one of claims 1 to 6, characterized in that: After controlling the stepper motor to power on and locking the stepper motor, the method further includes: When the condensation influencing parameter does not meet the condensation water generation condition and the duration reaches a preset time threshold, the stepping motor is controlled to exit the locked state.

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

10. An air conditioner, characterized in that: The air conditioner has a stepper motor protection program. When the air conditioner runs the stepper motor protection program, the control method for the stepper motor for the air conditioner according to any one of claims 1 to 8 is adopted.

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