Air conditioner motor anti-condensation control method, device and system and air conditioner

Abstract

The invention discloses an air conditioner motor anti-condensation control method, device and system and an air conditioner, and belongs to the field of motor anti-condensation. And after the first air humidity is obtained, if the preset condition is triggered and the first air humidity is larger than the preset humidity, the target air sweeping motor is controlled to be powered on in a single-phase mode. When the preset condition is triggered and the first air humidity is larger than the preset humidity, the target air sweeping motor is prone to condensation, and therefore single-phase power-on is conducted. Due to the fact that the air sweeping motor is a multi-phase motor, the target air sweeping motor does not sweep air and is low in power consumption when the single-phase power is on, but the single-phase power can enable the motor to be heated, the air temperature is increased, and condensation is avoided. And therefore, the conditions of air outlet peculiar smell, motor corrosion and motor short circuit are avoided, and normal operation of the air sweeping motor and reliable operation of an air conditioning system are guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of motor anti-condensation, and in particular, to a control method, device and system for anti-condensation of an air-conditioning motor and an air-conditioning. Background Art

[0002] In the long-term cooling or dehumidification operation mode of the air conditioner, when the sweeping motor in the indoor unit is not working, that is, when the sweeping motor is shut down, the air temperature inside the sweeping motor is quite different from the outside air temperature, and the alternating cold and hot conditions will produce condensation water that will accumulate on the motor. The condensation water will not only easily cause mold inside the motor, causing odor in the air, but will also corrode the motor and reduce its service life. In addition, the condensation water may also cause the motor to short-circuit, affecting the normal operation of the motor and the operation of the air conditioning system. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the present application provides a control method, device and system for preventing condensation of an air-conditioning motor, and an air-conditioner, so as to solve the problem that when the air-sweeping motor stops running in the long-term cooling or dehumidification operation mode of the air-conditioner, condensation is easily generated on the motor, resulting in mold inside the motor, causing odor in the air, corroding the motor, reducing the service life of the motor, and even causing a short circuit in the motor, affecting the normal operation of the motor and the operation of the air-conditioning system.

[0004] The technical solution adopted by this application to solve its technical problem is:

[0005] In a first aspect, a control method for preventing condensation of an air conditioner motor is provided, comprising:

[0006] obtaining a first air humidity;

[0007] When a preset condition is triggered and the first air humidity is greater than a preset humidity, the target wind sweeping motor is controlled to be powered on in a single phase, and the wind sweeping motor is a multi-phase motor.

[0008] Furthermore, the control target wind sweeping motor is powered on with single phase, including:

[0009] Obtaining the phase sequence of the target wind-sweeping motor and determining the target phase to be energized;

[0010] The target phase is controlled to be connected and a driving signal is sent to the target phase, wherein the driving signal is a DC voltage or a pulse signal.

[0011] Furthermore, it also includes:

[0012] When the driving signal is a pulse signal, obtaining a preset rotation speed and step angle of the target wind-sweeping motor and an actual current and a rated current of the target wind-sweeping motor;

[0013] The number of pulses required per revolution is calculated based on the step angle, and the target duty cycle is calculated based on the actual current and rated current of the target wind-sweeping motor; the calculation formula is: N=360° / θ, target duty cycle=actual current / rated current; wherein θ is the step angle, and N is the number of pulses required per revolution;

[0014] The target pulse frequency is determined according to the number of pulses required per revolution and the preset speed, and the calculation formula is: f=n*N / 60, where f is the target pulse frequency and n is the preset speed;

[0015] The pulse frequency of the pulse signal is controlled to be the target pulse frequency, and the duty cycle of the pulse signal is controlled to be the target duty cycle.

[0016] Furthermore, it also includes:

[0017] When the running time of the preset mode of the air conditioner operation is greater than the first preset time, the running conditions of all the air sweeping motors are obtained, and the preset mode is a cooling mode or a dehumidification mode;

[0018] Determine whether there is a target wind-sweeping motor based on the operating condition, wherein the operating condition of the target wind-sweeping motor is changed from a running state to a shutdown state;

[0019] If the target wind sweeping motor exists, the preset condition is determined to be triggered.

[0020] Further, obtaining the first air humidity includes:

[0021] When the preset condition is triggered, a first air humidity at the air sweeping motor is obtained.

[0022] Furthermore, it also includes:

[0023] After controlling the target wind sweeping motor to be single-phase powered for a second preset time, obtaining a second air humidity;

[0024] When the second air humidity is lower than the preset humidity, the air sweeping motor is controlled to stop single-phase power supply.

[0025] Further, obtaining the first air humidity includes:

[0026] The first air humidity at the air sweeping motor is obtained in real time.

[0027] In a second aspect, a control device for preventing condensation of an air conditioner motor is provided, comprising:

[0028] An air humidity acquisition module, used for acquiring a first air humidity;

[0029] The motor single-phase power-on module is used to control the single-phase power-on of the target wind sweeping motor when a preset condition is triggered and the first air humidity is greater than a preset humidity. The wind sweeping motor is a multi-phase motor.

[0030] In a third aspect, a control system for preventing condensation of an air conditioner motor is provided, comprising:

[0031] at least one processor and at least one memory;

[0032] The memory stores executable instructions of the processor;

[0033] The processor is configured to execute the above-mentioned control method for preventing condensation of the air-conditioning motor.

[0034] In a fourth aspect, an air conditioner is provided, which uses the above-mentioned control method for preventing condensation of the air conditioner motor.

[0035] Beneficial effects:

[0036] The technical solution of the present application provides a control method, device and system for preventing condensation of an air-conditioning motor, and an air conditioner. After obtaining the first air humidity, if the preset condition is triggered and the first air humidity is greater than the preset humidity, the target wind sweeping motor is controlled to be powered on in single phase. When the preset condition is triggered and the first air humidity is greater than the preset humidity, the target wind sweeping motor is prone to condensation, so single-phase power is applied. However, since the wind sweeping motor is a multi-phase motor, when single-phase power is applied, the target wind sweeping motor will not sweep the air, and the power consumption is low, but single-phase power application can make the motor heat up, increase the air temperature, and avoid condensation. This can avoid the occurrence of odor in the air, corrosion of the motor, and motor short circuit, thereby ensuring the normal operation of the wind sweeping motor and the reliable operation of the air conditioning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 This is a flow chart of a control method for preventing condensation of an air-conditioning motor provided in an embodiment of the present application;

[0039] Figure 2 This is a flow chart of a specific air-conditioning motor anti-condensation control method provided in an embodiment of the present application;

[0040] Figure 3 It is a schematic diagram of the structure of a control device for preventing condensation of an air-conditioning motor provided in an embodiment of the present application;

[0041] Figure 4 It is a schematic diagram of the structure of a control system for preventing condensation of an air-conditioning motor provided in an embodiment of the present application. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the present application is described in detail below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other implementation methods obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0043] In the past, the solution to the condensation problem of motors was to apply glue to the motors to prevent condensation from entering the circuit and causing the motor to short-circuit. However, when gluing is done manually, the labor intensity is high and the gluing quality is unstable. If automatic gluing is used, the production line cost is too high.

[0044] Some other solutions are to install additional heating devices for heating, but the heating devices will increase the overall cost of the air conditioner, and the heating devices need to occupy a certain space, which requires changing the traditional design of the air conditioner, and the size of the air conditioner will become larger after the addition.

[0045] To solve this problem, refer to Figure 1 The embodiment of the present application provides a control method for preventing condensation of an air conditioner motor, comprising:

[0046] S11: Obtaining a first air humidity;

[0047] Some air conditioners do not have a humidity sensor. The first air humidity acquisition method can be to use a humidity sensor on a target device that can communicate with the air conditioner, or to manually input the humidity. However, although this method does not require an additional humidity sensor, the air conditioner and the target device may be far apart, so the anti-condensation effect is relatively poor.

[0048] When the air conditioner itself is equipped with a humidity sensor (such as a dehumidification function, and a humidity sensor specifically provided for obtaining indoor humidity), the first air humidity acquisition method can use the humidity sensor originally installed on the air conditioner to obtain the humidity. This acquisition method does not require the installation of an additional humidity sensor. The humidity sensor is also located around the air conditioner. Compared with the humidity manually input or detected by the target device, the anti-condensation effect is relatively good, and there is no need for an additional humidity sensor.

[0049] However, in this way, since the humidity sensor is installed at a relatively far distance from the wind sweeping motor, the measured air humidity cannot accurately represent the air humidity at the wind sweeping motor, and the final anti-condensation effect is also poor.

[0050] Because as a preferred implementation method of the embodiment of the present application: a humidity sensor is installed near the wind sweeping motor, and the humidity sensor is close to the wind sweeping motor (the distance between the installation position and the wind sweeping motor is less than the threshold, and there is no obstruction between them) to accurately monitor the humidity changes around the motor.

[0051] For example, a high-precision capacitive humidity sensor is used to accurately measure humidity by detecting the capacitance change caused by the change in water vapor content in the air. The humidity sensor has the characteristics of high precision and fast response, and can output analog or digital signals, which is convenient for integration with air conditioning control circuits. The humidity sensor monitors the relative humidity of the air around the motor in real time, and converts it into an analog signal or a digital signal and sends it to the air conditioning control circuit.

[0052] In one embodiment, obtaining the first air humidity includes:

[0053] The first air humidity at the wind sweeping motor is obtained in real time. That is, a sampling period is set, and the air humidity around the wind sweeping motor is obtained every sampling period. However, the inventors found that when the air conditioner is turned on and the heating mode is operated, or when the wind sweeping function is not used at all after the air conditioner is turned on, the air temperature inside and outside the wind sweeping motor is not much different, and condensation will not occur. Therefore, if the sampling period is set, when the heating mode is operated after the air conditioner is turned on, or when the wind sweeping function is not used at all after the air conditioner is turned on, the first air humidity collected will not be greater than the preset humidity, that is, there is no risk of condensation. The collection cost and data processing cost are increased in vain.

[0054] Based on this, in another embodiment, obtaining the first air humidity includes:

[0055] When the preset condition is triggered, the first air humidity at the wind sweeping motor is acquired. That is, in the embodiment of the present application, the first air humidity at the wind sweeping motor is acquired only when condensation is possible at the wind sweeping motor. For example, when the preset condition is triggered, the first air humidity is acquired once at a preset period.

[0056] Wherein, whether the preset condition is triggered is determined according to the air-conditioning operation mode and the operation status of the air-sweeping motor.

[0057] When the running time of the preset air conditioner running mode is greater than the first preset time, the running conditions of all the air sweeping motors are obtained, and the preset mode is the cooling mode or the dehumidification mode; in other modes, the temperature difference between the inside and outside of the air sweeping motor is not large, and there is no condensation risk. Therefore, the air conditioner running mode is limited to the cooling mode or the dehumidification mode. At this time, the indoor temperature is generally high, and the air conditioner blows out cold air, which easily causes a large temperature difference between the inside and outside of the air sweeping motor.

[0058] Based on the operating conditions, it is determined whether there is a target wind sweeping motor, and the operating conditions of the target wind sweeping motor are changed from the operating state to the shutdown state; when the air conditioner is cooling or dehumidifying, if the wind sweeping motor has never been turned on, the temperature difference between the inside and outside of the wind sweeping motor is not large, and the risk of condensation is low, so it is also determined that the preset condition has not been triggered at this time. Only after the wind sweeping is turned on (that is, the wind sweeping motor has an operating stage after the air conditioner is turned on) and the current wind sweeping motor is stopped (when running, the wind sweeping motor will heat up and will not condense), at this time, the temperature difference between the inside and outside will be large, and if the air humidity near the motor is high, condensation will occur.

[0059] If the target wind sweeping motor exists, the preset condition is determined to be triggered.

[0060] Optionally, the preset condition can also be simply set to that the running time of the preset mode of the air conditioner is greater than the first preset time, and the preset mode is a cooling mode or a dehumidification mode. At this time, it is determined that the preset condition is triggered.

[0061] S12: When a preset condition is triggered and the first air humidity is greater than a preset humidity, the target air sweeping motor is controlled to be powered on in a single phase, and the air sweeping motor is a multi-phase motor.

[0062] Among them, a multi-phase motor refers to a stepper motor with at least two windings. The most commonly used air-conditioning air-sweeping motor is a four-phase motor, and some air-conditioning air-sweeping motors also use two-phase motors or three-phase motors.

[0063] As an optional implementation method of the embodiment of the present application, controlling the single-phase power supply of the target wind sweeping motor includes:

[0064] The phase sequence of the target wind-sweeping motor is obtained, and the target phase to be energized is determined; the phase sequence of the target wind-sweeping motor is obtained in order to identify each winding of the motor, wherein the target phase is any phase.

[0065] The target phase is controlled to be connected and a driving signal is sent to the target phase, wherein the driving signal is a DC voltage or a pulse signal. It is understandable that when a single phase is energized, when the target phase is connected, the other phases are in an open circuit state.

[0066] The purpose of single-phase power supply is to make the motor heat up. When single-phase power supply is applied, a single set of coils is energized, and the current of this set of coils flows through, generating heat, and then the stepper motor heats up, raising the temperature of the motor, which can effectively increase the temperature inside the motor cavity, reduce the temperature and humidity difference between the motor and the surrounding environment, reduce the risk of condensation, and ensure the stable operation of the motor. The reason for not electrifying all windings is that the wind sweep is not turned on at this time, and the motor does not need to move. The reason for not electrifying more windings is that the more energized windings, the higher the power consumption. Energizing only one winding can reduce energy consumption while preventing condensation.

[0067] In addition, compared with DC voltage, pulse signal has better control accuracy and can also reduce damage to the wind sweeping motor and extend the service life of the motor. Therefore, in actual use, pulse signal is generally used.

[0068] As a preferred implementation method of the embodiment of the present application, when the drive signal is a pulse signal, the preset speed and step angle of the target wind-sweeping motor and the actual current and rated current of the target wind-sweeping motor are obtained; wherein the preset speed is set manually, and the step angle can be obtained by querying the parameter table of the stepper motor, or can be determined by experiment, which is not limited in the present application. The actual current is measured by a current measuring device, or the control system actively obtains and saves it when the motor is working. The rated current is obtained by querying the parameter table or nameplate of the stepper motor.

[0069] The number of pulses required per revolution is calculated based on the step angle, and the target duty cycle is calculated based on the actual current and rated current of the target wind-sweeping motor; the calculation formula is: N=360° / θ, target duty cycle=actual current / rated current; wherein θ is the step angle, and N is the number of pulses required per revolution;

[0070] The target pulse frequency is determined according to the number of pulses required per revolution and the preset speed, and the calculation formula is: f=n*N / 60, where f is the target pulse frequency and n is the preset speed;

[0071] The pulse frequency of the pulse signal is controlled to be the target pulse frequency, and the duty cycle of the pulse signal is controlled to be the target duty cycle.

[0072] In addition, after single-phase power-on, when the air humidity is lower than the preset humidity, the air sweeping motor is controlled to stop single-phase power-on, and the air conditioner operates normally.

[0073] If the air humidity is acquired in real time, no additional triggering condition needs to be set. However, if the first air humidity is acquired when a preset condition is triggered, the following method is used:

[0074] After controlling the target wind sweeping motor to be single-phase powered for a second preset time, obtaining a second air humidity;

[0075] When the second air humidity is less than the preset humidity value, the air sweeping motor is controlled to stop single-phase power supply.

[0076] The control method for preventing condensation of an air-conditioning motor provided in an embodiment of the present application controls the target wind sweeping motor to be powered on in single phase after obtaining the first air humidity, if a preset condition is triggered and the first air humidity is greater than the preset humidity. When the preset condition is triggered and the first air humidity is greater than the preset humidity, the target wind sweeping motor is prone to condensation, so single-phase power is applied. However, since the wind sweeping motor is a multi-phase motor, the target wind sweeping motor will not sweep the air when powered on in single phase, and the power consumption is low. However, single-phase power application can make the motor heat up, increase the air temperature, and avoid condensation. This avoids the occurrence of odor in the air, corrosion of the motor, and motor short circuit, thereby ensuring the normal operation of the wind sweeping motor and the reliable operation of the air conditioning system.

[0077] In order to more clearly illustrate the present application scheme, a specific air conditioner motor anti-condensation control method is provided below. Figure 2 As shown, the following steps are included:

[0078] Install a humidity sensor near the motor. The humidity sensor should be close to the motor to accurately monitor the humidity changes around the motor. Use a high-precision capacitive humidity sensor to accurately measure humidity by detecting the capacitance changes caused by changes in the water vapor content in the air. The humidity sensor has the characteristics of high precision and fast response, and can output analog or digital signals, which is convenient for integration with air conditioning control circuits.

[0079] The humidity sensor monitors the relative humidity of the air around the motor in real time. When the relative humidity reaches saturation or is close to condensation humidity, such as 95% relative humidity, the sensor converts the humidity signal into an electrical signal and feeds it back to the air conditioner control system. The control system determines whether to start the anti-condensation logic based on these feedback signals, and further controls whether the air conditioner turns on the left and right sweeping stepper motors to enter the anti-condensation logic.

[0080] The left and right sweeping motors of the air conditioner are usually stepper motors. When working normally, each phase needs to be energized in a specific order to drive the motor to rotate. The working principle of the stepper motor determines that it has high requirements for current and voltage. Therefore, the motor needs to be turned on specifically when the anti-condensation function is turned on. The present invention is designed to turn on only one phase of the motor when the anti-condensation function is turned on. The specific implementation operation is as follows:

[0081] First, determine the phase sequence of the motor; you need to first identify the four-phase winding lead wires of the motor and the corresponding phase sequence markings. (It should be noted that stepper motors are not necessarily four-phase, and only four-phase stepper motors are used as an example here. It can be two-phase or three-phase, or it can be four-phase. Conventional ones are generally two-phase stepper motors and four-phase stepper motors. The main difference between two-phase stepper motors and four-phase stepper motors is the number of coils and control accuracy. Four-phase stepper motors usually have higher control accuracy and stability, and are suitable for application scenarios that require high-precision control. The two-phase stepper motor has a simple structure and low cost, and is suitable for occasions where control accuracy is not required. The air conditioner needs to accurately control the wind direction when sweeping left and right. The high precision of the four-phase stepper motor is more in line with this requirement, and the four-phase stepper motor has more advantages in accuracy, stability and noise control.)

[0082] Then, connect the circuit; you need to design or select a suitable driver to control each phase of the motor, using a microcontroller (such as Arduino, Raspberry Pi, etc.) or a programmable logic controller (PLC), and you need to write a corresponding control program to implement the single-phase power-on mode, so that one phase of the motor is connected and the other three phase windings remain open. For example, if the four phases of the motor are marked A, B, C, and D, the control selects phase A (any phase, no specific selection is required) to connect, and the other phases are disconnected.

[0083] Then, apply the drive signal; apply an appropriate drive signal to the connected phase winding, and the drive signal can be a DC voltage or a pulse signal. If a DC voltage is applied, it should be noted that the voltage value should be within the rated voltage range of the motor to avoid damaging the motor; if a pulse signal is applied, it is necessary to determine the appropriate pulse frequency and duty cycle according to the step angle and speed requirements of the motor. Specifically, f = n*N / 60, where f is the target pulse frequency, n is the preset speed, and N is the number of pulses required per revolution. N = 360° / θ, target duty cycle = actual current / rated current; where θ is the step angle. The step angle refers to the corresponding angular displacement of the stepper motor rotor when an electrical pulse signal is input. It is related to the number of phases of the control winding, the number of rotor teeth, and the power-on method. The smaller the step angle, the better the smoothness of the motor operation.

[0084] When the motor anti-condensation mode is entered for a certain period of time, such as 10 minutes, and the humidity is detected again to be less than 60%, the single-phase anti-condensation mode is shut down and the air conditioning system operates normally.

[0085] It should be noted that the principle is as follows: when the left and right sweeping motors are stopped (the sweeping function is not started), condensation is likely to occur, especially in cooling or dehumidification mode. When single-phase power is on, a single set of coils is energized, and the current of this set of coils flows through, generating heat, and then the stepper motor heats up, increasing the temperature of the motor, which can effectively increase the temperature inside the motor cavity, reduce the temperature and humidity difference between the motor and the surrounding environment, reduce the risk of condensation, and ensure the stable operation of the motor. The reason for not electrifying all windings is that the sweeping is not turned on at this time, and the motor does not need to move, and the reason for not electrifying more windings is that the more energized windings, the higher the power consumption. Energizing only one winding can reduce energy consumption while preventing condensation.

[0086] In summary, the present invention provides an effective control method for preventing condensation in the motor of the air conditioner. By installing a high-precision capacitive humidity sensor near the motor, the humidity change is monitored in real time, and the anti-condensation logic is activated by the control system to increase the temperature of the motor. This can effectively increase the temperature in the motor cavity, reduce the temperature difference and humidity difference between the motor and the surrounding environment, and ensure the stable operation of the motor. This not only reduces the formation of condensation in the motor housing, but also inhibits the growth of internal mold, providing users with a healthier and more reliable air-conditioning environment.

[0087] Its advantages are:

[0088] 1. Improve electrical safety, prevent condensation on the motor surface, reduce short circuit risks, and extend the service life of the motor.

[0089] 2. Improve the mechanical properties of the motor, avoid water vapor and moisture entering the motor to cause corrosion, maintain good motor mechanical properties, and improve the stability of normal operation of the motor.

[0090] 3. Ensure user health, reduce condensation around the motor, prevent the growth of mold and bacteria, reduce odor, improve indoor comfort experience, and protect user health.

[0091] Based on the same inventive concept, Figure 3 As shown, the present application also provides a control device 30 for preventing condensation of an air-conditioning motor, comprising:

[0092] An air humidity acquisition module 31, used to acquire a first air humidity;

[0093] Some air conditioners do not have a humidity sensor. The first air humidity acquisition method can be to use a humidity sensor on a target device that can communicate with the air conditioner, or to manually input the humidity. However, although this method does not require an additional humidity sensor, the air conditioner and the target device may be far apart, so the anti-condensation effect is relatively poor.

[0094] When the air conditioner itself is equipped with a humidity sensor (such as a dehumidification function, and a humidity sensor specifically provided for obtaining indoor humidity), the first air humidity acquisition method can use the humidity sensor originally installed on the air conditioner to obtain the humidity. This acquisition method does not require the installation of an additional humidity sensor. The humidity sensor is also located around the air conditioner. Compared with the humidity manually input or detected by the target device, the anti-condensation effect is relatively good, and there is no need for an additional humidity sensor.

[0095] However, in this way, since the humidity sensor is installed at a relatively far distance from the wind sweeping motor, the measured air humidity cannot accurately represent the air humidity at the wind sweeping motor, and the final anti-condensation effect is also poor.

[0096] Because as a preferred implementation method of the embodiment of the present application: a humidity sensor is installed near the wind sweeping motor, and the humidity sensor is close to the wind sweeping motor (the distance between the installation position and the wind sweeping motor is less than the threshold, and there is no obstruction between them) to accurately monitor the humidity changes around the motor.

[0097] For example, a high-precision capacitive humidity sensor is used to accurately measure humidity by detecting the capacitance change caused by the change in water vapor content in the air. The humidity sensor has the characteristics of high precision and fast response, and can output analog or digital signals, which is convenient for integration with air conditioning control circuits. The humidity sensor monitors the relative humidity of the air around the motor in real time, and converts it into an analog signal or a digital signal and sends it to the air conditioning control circuit.

[0098] In one embodiment, obtaining the first air humidity includes:

[0099] The first air humidity at the wind sweeping motor is obtained in real time. That is, a sampling period is set, and the air humidity around the wind sweeping motor is obtained every sampling period. However, the inventors found that when the air conditioner is turned on and the heating mode is operated, or when the wind sweeping function is not used at all after the air conditioner is turned on, the air temperature inside and outside the wind sweeping motor is not much different, and condensation will not occur. Therefore, if the sampling period is set, when the heating mode is operated after the air conditioner is turned on, or when the wind sweeping function is not used at all after the air conditioner is turned on, the first air humidity collected will not be greater than the preset humidity, that is, there is no risk of condensation. The collection cost and data processing cost are increased in vain.

[0100] Based on this, in another embodiment, obtaining the first air humidity includes:

[0101] When the preset condition is triggered, the first air humidity at the wind sweeping motor is acquired. That is, in the embodiment of the present application, the first air humidity at the wind sweeping motor is acquired only when condensation is possible at the wind sweeping motor. For example, when the preset condition is triggered, the first air humidity is acquired once at a preset period.

[0102] Wherein, whether the preset condition is triggered is determined according to the air-conditioning operation mode and the operation status of the air-sweeping motor.

[0103] When the running time of the preset air conditioner running mode is greater than the first preset time, the running conditions of all the air sweeping motors are obtained, and the preset mode is the cooling mode or the dehumidification mode; in other modes, the temperature difference between the inside and outside of the air sweeping motor is not large, and there is no condensation risk. Therefore, the air conditioner running mode is limited to the cooling mode or the dehumidification mode. At this time, the indoor temperature is generally high, and the air conditioner blows out cold air, which easily causes a large temperature difference between the inside and outside of the air sweeping motor.

[0104] Based on the operating conditions, it is determined whether there is a target wind sweeping motor, and the operating conditions of the target wind sweeping motor are changed from the operating state to the shutdown state; when the air conditioner is cooling or dehumidifying, if the wind sweeping motor has never been turned on, the temperature difference between the inside and outside of the wind sweeping motor is not large, and the risk of condensation is low, so it is also determined that the preset condition has not been triggered at this time. Only after the wind sweeping is turned on (that is, the wind sweeping motor has an operating stage after the air conditioner is turned on) and the current wind sweeping motor is stopped (when running, the wind sweeping motor will heat up and will not condense), at this time, the temperature difference between the inside and outside will be large, and if the air humidity near the motor is high, condensation will occur.

[0105] If the target wind sweeping motor exists, the preset condition is determined to be triggered.

[0106] Optionally, the preset condition can also be simply set to that the running time of the preset mode of the air conditioner is greater than the first preset time, and the preset mode is a cooling mode or a dehumidification mode. At this time, it is determined that the preset condition is triggered.

[0107] The motor single-phase power-on module 32 is used to control the target wind sweeping motor to be single-phase powered when a preset condition is triggered and the first air humidity is greater than a preset humidity. The wind sweeping motor is a multi-phase motor.

[0108] Among them, a multi-phase motor refers to a stepper motor with at least two windings. The most commonly used air-conditioning air-sweeping motor is a four-phase motor, and some air-conditioning air-sweeping motors also use two-phase motors or three-phase motors.

[0109] As an optional implementation method of the embodiment of the present application, controlling the single-phase power supply of the target wind sweeping motor includes:

[0110] The phase sequence of the target wind-sweeping motor is obtained, and the target phase to be energized is determined; the phase sequence of the target wind-sweeping motor is obtained in order to identify each winding of the motor, wherein the target phase is any phase.

[0111] The target phase is controlled to be connected and a driving signal is sent to the target phase, wherein the driving signal is a DC voltage or a pulse signal. It is understandable that when a single phase is energized, when the target phase is connected, the other phases are in an open circuit state.

[0112] The purpose of single-phase power supply is to make the motor heat up. When single-phase power supply is applied, a single set of coils is energized, and the current of this set of coils flows through, generating heat, and then the stepper motor heats up, raising the temperature of the motor, which can effectively increase the temperature inside the motor cavity, reduce the temperature and humidity difference between the motor and the surrounding environment, reduce the risk of condensation, and ensure the stable operation of the motor. The reason for not electrifying all windings is that the wind sweep is not turned on at this time, and the motor does not need to move. The reason for not electrifying more windings is that the more energized windings, the higher the power consumption. Energizing only one winding can reduce energy consumption while preventing condensation.

[0113] In addition, compared with DC voltage, pulse signal has better control accuracy and can also reduce damage to the wind sweeping motor and extend the service life of the motor. Therefore, in actual use, pulse signal is generally used.

[0114] As a preferred implementation method of the embodiment of the present application, when the drive signal is a pulse signal, the preset speed and step angle of the target wind-sweeping motor and the actual current and rated current of the target wind-sweeping motor are obtained; wherein the preset speed is set manually, and the step angle can be obtained by querying the parameter table of the stepper motor, or can be determined by experiment, which is not limited in the present application. The actual current is measured by a current measuring device, or the control system actively obtains and saves it when the motor is working. The rated current is obtained by querying the parameter table or nameplate of the stepper motor.

[0115] The number of pulses required per revolution is calculated based on the step angle, and the target duty cycle is calculated based on the actual current and rated current of the target wind-sweeping motor; the calculation formula is: N=360° / θ, target duty cycle=actual current / rated current; wherein θ is the step angle, and N is the number of pulses required per revolution;

[0116] The target pulse frequency is determined according to the number of pulses required per revolution and the preset speed, and the calculation formula is: f=n*N / 60, where f is the target pulse frequency and n is the preset speed;

[0117] The pulse frequency of the pulse signal is controlled to be the target pulse frequency, and the duty cycle of the pulse signal is controlled to be the target duty cycle.

[0118] In addition, after single-phase power-on, when the air humidity is lower than the preset humidity, the air sweeping motor is controlled to stop single-phase power-on, and the air conditioner operates normally.

[0119] If the air humidity is acquired in real time, no additional triggering condition needs to be set. However, if the first air humidity is acquired when a preset condition is triggered, the following method is used:

[0120] After controlling the target wind sweeping motor to be single-phase powered for a second preset time, obtaining a second air humidity;

[0121] When the second air humidity is less than the preset humidity value, the air sweeping motor is controlled to stop single-phase power supply.

[0122] The control device for preventing condensation of an air-conditioning motor provided in an embodiment of the present application controls the target wind sweeping motor to be powered on in single phase after obtaining the first air humidity if a preset condition is triggered and the first air humidity is greater than the preset humidity. When the preset condition is triggered and the first air humidity is greater than the preset humidity, the target wind sweeping motor is prone to condensation, so single-phase power is applied. However, since the wind sweeping motor is a multi-phase motor, the target wind sweeping motor will not sweep the air when powered on in single phase, and the power consumption is low. However, single-phase power application can make the motor heat up, increase the air temperature, and avoid condensation. This avoids the occurrence of peculiar smell in the air, corrosion of the motor, and motor short circuit, thereby ensuring the normal operation of the wind sweeping motor and the reliable operation of the air conditioning system.

[0123] Based on the same inventive concept, Figure 4 As shown, the present application also provides a control system 40 for preventing condensation of an air-conditioning motor, comprising:

[0124] at least one processor 41 and at least one memory 42;

[0125] The memory stores executable instructions of the processor;

[0126] The processor is configured to execute the control method for preventing condensation of the air-conditioning motor provided in the above embodiment.

[0127] The control system for preventing condensation of air-conditioning motors provided in the embodiment of the present application stores executable instructions of the processor in a memory. When the executable instructions are executed, the processor can, after obtaining the first air humidity, control the single-phase power-on of the target wind sweeping motor if a preset condition is triggered and the first air humidity is greater than the preset humidity. When the preset condition is triggered and the first air humidity is greater than the preset humidity, the target wind sweeping motor is prone to condensation, so single-phase power-on is performed. However, since the wind sweeping motor is a multi-phase motor, when single-phase power-on is performed, the target wind sweeping motor will not sweep the air, and the power consumption is low. However, single-phase power-on can make the motor heat up, increase the air temperature, and avoid condensation. This avoids the occurrence of odor in the air, corrosion of the motor, and motor short circuit, thereby ensuring the normal operation of the wind sweeping motor and the reliable operation of the air conditioning system.

[0128] Based on the same inventive concept, the present application also provides an air conditioner, which uses the control method for preventing condensation of the air conditioner motor provided in the above embodiment.

[0129] The air conditioner provided in the embodiment of the present application, by applying the control method for preventing condensation of the air conditioner motor provided in the above embodiment, can, after obtaining the first air humidity, control the target wind sweeping motor to be powered on in single phase if the preset condition is triggered and the first air humidity is greater than the preset humidity. When the preset condition is triggered and the first air humidity is greater than the preset humidity, the target wind sweeping motor is prone to condensation, so it is powered on in single phase. However, since the wind sweeping motor is a multi-phase motor, when powered on in single phase, the target wind sweeping motor will not sweep the air, and the power consumption is low, but single-phase power supply can make the motor heat up, increase the air temperature, and avoid condensation. This avoids the situation of causing odor in the air, corrosion of the motor, and motor short circuit, and ensures the normal operation of the wind sweeping motor and the reliable operation of the air conditioning system.

[0130] It should be noted that, in the description of this application, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of this application, unless otherwise specified, the meaning of "plurality" refers to at least two.

[0131] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

Claims

1. A control method for preventing condensation of an air conditioner motor, characterized in that: include: obtaining a first air humidity; When a preset condition is triggered and the first air humidity is greater than a preset humidity, the target wind sweeping motor is controlled to be powered on in a single phase, and the wind sweeping motor is a multi-phase motor.

2. The method according to claim 1, characterized in that: The control target wind sweeping motor is powered on in single phase, including: Obtaining the phase sequence of the target wind-sweeping motor and determining the target phase to be energized; The target phase is controlled to be connected and a driving signal is sent to the target phase, wherein the driving signal is a DC voltage or a pulse signal.

3. The method according to claim 2, characterized in that Also includes: When the driving signal is a pulse signal, obtaining a preset rotation speed and step angle of the target wind-sweeping motor and an actual current and a rated current of the target wind-sweeping motor; The required number of pulses per revolution is calculated based on the step angle, and the target duty cycle is calculated based on the actual current and rated current of the target wind-sweeping motor; The calculation formula is: N = 360° / θ, target duty cycle = actual current / rated current; where θ is the step angle and N is the number of pulses required per revolution; The target pulse frequency is determined according to the number of pulses required per revolution and the preset speed, and the calculation formula is: f=n*N / 60, where f is the target pulse frequency and n is the preset speed; The pulse frequency of the pulse signal is controlled to be the target pulse frequency, and the duty cycle of the pulse signal is controlled to be the target duty cycle.

4. The method according to claim 1, characterized in that: Also includes: When the running time of the preset mode of the air conditioner operation is greater than the first preset time, the running conditions of all the air sweeping motors are obtained, and the preset mode is a cooling mode or a dehumidification mode; Determine whether there is a target wind-sweeping motor based on the operating condition, wherein the operating condition of the target wind-sweeping motor is changed from a running state to a shutdown state; If the target wind sweeping motor exists, the preset condition is determined to be triggered.

5. The method according to claim 1, characterized in that The obtaining of the first air humidity comprises: When the preset condition is triggered, a first air humidity at the air sweeping motor is obtained.

6. The method according to claim 1, characterized in that Also includes: After controlling the target wind sweeping motor to be single-phase powered for a second preset time, obtaining a second air humidity; When the second air humidity is lower than the preset humidity, the air sweeping motor is controlled to stop single-phase power supply.

7. The method according to claim 1, characterized in that: The obtaining of the first air humidity comprises: The first air humidity at the air sweeping motor is obtained in real time.

8. A control device for preventing condensation of an air conditioner motor, characterized in that: include: An air humidity acquisition module, used for acquiring a first air humidity; The motor single-phase power-on module is used to control the single-phase power-on of the target wind sweeping motor when a preset condition is triggered and the first air humidity is greater than a preset humidity. The wind sweeping motor is a multi-phase motor.

9. A control system for preventing condensation of an air conditioner motor, characterized in that: include: at least one processor and at least one memory; The memory stores executable instructions of the processor; The processor is configured to execute the method according to any one of claims 1 to 7.

10. An air conditioner, characterized in that: The method according to any one of claims 1 to 7 is used.

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