Air conditioner external fan control method and device and air conditioning equipment

Abstract

The embodiment of the invention provides an air conditioner outer fan control method and device and air conditioner equipment, and relates to the technical field of air conditioners, the method comprises the steps that first data are collected, and the first data comprise environment temperature data, environment humidity data, air conditioner operation data and condenser coil pipe temperature data; according to the first data, whether the condenser has a frosting risk or not is determined; and when the condenser has the frosting risk, the rotating speed of the outer fan is adjusted according to a preset control strategy. According to the technical scheme provided by the embodiment of the invention, the technical problems that an existing defrosting strategy not only affects the heating efficiency, but also affects the user experience due to sudden increase of noise in the defrosting period can be solved.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to a method, device, and air conditioning equipment for controlling an outdoor fan of an air conditioner. Background Technology

[0002] When an air conditioner is running in heating mode, frost easily forms on the surface of the condenser fins. The gradual accumulation of frost significantly reduces the heat exchange efficiency of the condenser, resulting in a decrease in the air conditioner's heating capacity and a slow rise in the indoor temperature.

[0003] In related technologies, air conditioner frost control mainly relies on periodic defrosting strategies. For example, when the condenser coil temperature is detected to be consistently below a set threshold, a defrosting mode of fixed duration is activated, forcibly defrosting through reverse circulation or high-speed operation of the outdoor fan. However, this frost strategy only triggers defrosting when the frost layer is thick, which not only affects heating efficiency but also impacts user experience due to a sudden increase in noise during defrosting. Summary of the Invention

[0004] This invention provides a method, device, and air conditioning equipment for controlling an outdoor fan of an air conditioner, which can solve the technical problem that existing defrosting strategies not only affect heating efficiency but also affect user experience due to sudden increases in noise during defrosting.

[0005] In a first aspect, the present invention provides a method for controlling an outdoor fan of an air conditioner, the method comprising:

[0006] Collect the first data, which includes ambient temperature data, ambient humidity data, air conditioner operation data, and condenser coil temperature data;

[0007] Based on the initial data, determine whether there is a risk of frost formation on the condenser;

[0008] When there is a risk of condensation on the condenser, the speed of the outdoor fan is adjusted according to the preset control strategy;

[0009] The above-mentioned adjustment of the external fan speed according to the preset control strategy includes:

[0010] Every first time interval, the speed of the outdoor fan is adjusted to the first speed; after the outdoor fan runs at the first speed for a second time interval, the outdoor fan current and / or the outdoor fan drive module temperature are monitored; the speed of the outdoor fan is adjusted according to the outdoor fan current and / or the outdoor fan drive module temperature.

[0011] In one possible implementation, the above-mentioned collection of the first data includes:

[0012] Determine whether the air conditioner meets the conditions for entering the first working mode; in the first working mode, the operating frequency of the air conditioner's compressor is greater than a first frequency threshold, the first frequency threshold being the maximum operating frequency of the compressor in other working modes besides the first working mode;

[0013] When the conditions for entering the first working mode are met, the first data is collected.

[0014] In one possible implementation, the air conditioning operating data includes the air conditioning operating frequency, and the determination of whether there is a risk of condenser frosting based on the first data includes:

[0015] The condenser is considered to be at risk of frosting when the first data meets the following conditions:

[0016] The ambient temperature data is lower than the first temperature threshold; the first temperature threshold includes the critical temperature for condenser to freeze.

[0017] The ambient humidity data is greater than or equal to the preset humidity threshold;

[0018] The air conditioner's operating frequency is greater than or equal to the preset frequency threshold;

[0019] The condenser coil temperature data is lower than the second temperature threshold within a preset duration; the second temperature threshold is determined based on ambient temperature and humidity data.

[0020] In one possible implementation, adjusting the speed of the outdoor fan based on the outdoor fan current and / or the outdoor fan drive module temperature includes:

[0021] When the current of the external fan is less than the demagnetization protection current of the external fan, and / or the temperature of the external fan drive module is less than the demagnetization protection temperature of the external fan, the speed of the external fan is increased by the first adjustment range every third time interval.

[0022] In one possible implementation, adjusting the speed of the outdoor fan based on the outdoor fan current and / or the outdoor fan drive module temperature includes:

[0023] When the current of the external fan is greater than or equal to the demagnetization protection current of the external fan, and / or the temperature of the external fan drive module is greater than or equal to the demagnetization protection temperature of the external fan, the speed of the external fan is reduced by the second adjustment range every fourth time interval until the current of the external fan is less than the demagnetization protection current of the external fan, and / or the temperature of the external fan drive module is less than the demagnetization protection temperature of the external fan.

[0024] In one possible implementation, the above method further includes:

[0025] When the outdoor fan operates at a speed greater than or equal to the first speed for a duration greater than or equal to the fifth duration, the speed of the outdoor fan will be restored to the reference speed; the reference speed is the speed of the outdoor fan before it was adjusted according to the control strategy.

[0026] In a second aspect, the present invention provides an air conditioner outdoor fan control device, comprising:

[0027] The data acquisition module is used to collect the first data, which includes ambient temperature data, ambient humidity data, air conditioner operation data, and condenser coil temperature data.

[0028] The determination module is used to determine whether there is a risk of frost formation on the condenser based on the first data;

[0029] The control module is used to adjust the speed of the external fan according to a preset control strategy when there is a risk of condensation on the condenser;

[0030] The above-mentioned adjustment of the external fan speed according to the preset control strategy includes:

[0031] Every first time interval, the speed of the outdoor fan is adjusted to the first speed; after the outdoor fan runs at the first speed for a second time interval, the outdoor fan current and / or the outdoor fan drive module temperature are monitored; the speed of the outdoor fan is adjusted according to the outdoor fan current and / or the outdoor fan drive module temperature.

[0032] Thirdly, the present invention provides an air conditioning device, the air conditioner including a memory and a processor;

[0033] The memory stores the instructions that the computer executes;

[0034] The processor executes computer execution instructions stored in memory, causing the processor to perform the first aspect and / or various possible implementations of the first aspect.

[0035] Fourthly, the present invention provides a computer-readable storage medium storing computer-executable instructions that, when executed by a processor, are used to implement the first aspect and / or various possible embodiments thereof.

[0036] Fifthly, the present invention provides a computer program product comprising a computer program that, when executed by a processor, implements the first aspect and / or various possible implementations of the first aspect.

[0037] The air conditioner outdoor fan control method, device, and air conditioning equipment provided by this invention dynamically determine whether there is a risk of frost formation on the condenser by comprehensively considering data such as ambient temperature, ambient humidity, air conditioning operating parameters, and condenser coil temperature. When there is a risk of frost formation, the speed of the outdoor fan is adjusted according to a preset control strategy to promptly blow away the slight frost layer on the surface of the condenser fins. This not only improves heating efficiency but also avoids affecting the user experience due to a sudden increase in noise during defrosting. Attached Figure Description

[0038] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0039] Figure 1 This is a schematic diagram of the structure of an air conditioning device provided in an embodiment of the present invention;

[0040] Figure 2 This is a flowchart illustrating an air conditioner outdoor fan control method provided in an embodiment of the present invention;

[0041] Figure 3 This is another flowchart illustrating an air conditioner outdoor fan control method provided in an embodiment of the present invention;

[0042] Figure 4 This is a schematic diagram of the structure of an air conditioner outdoor fan control device provided in an embodiment of the present invention;

[0043] Figure 5 This is a schematic diagram of the hardware structure of an air conditioning device provided in an embodiment of the present invention.

[0044] The accompanying drawings have illustrated specific embodiments of the invention, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0045] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0046] In embodiments of the present invention, terms such as "first" and "second" are used to distinguish identical or similar items with essentially the same function and effect. For example, "first data" and "first data" are merely used to distinguish different data and do not limit their order. Those skilled in the art will understand that terms such as "first" and "second" do not limit the quantity or execution order, and that "first" and "second" do not necessarily imply that they are different.

[0047] It should be noted that in the embodiments of the present invention, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design scheme described as "exemplary" or "for example" in the present invention should not be construed as being more preferred or advantageous than other embodiments or design schemes. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0048] In this embodiment of the invention, "at least one" refers to one or more items; "and / or" describes the relationship between the associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following associated objects have an "or" relationship.

[0049] For example, refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of an air conditioning device provided in an embodiment of the present invention.

[0050] In some embodiments, the air conditioning unit 100 includes an indoor unit 110 and an outdoor unit 120.

[0051] Optionally, the indoor unit 110 includes an indoor controller 111 and an indoor fan 112.

[0052] The indoor controller 111 is used to receive control commands from users. For example, users can send control commands related to the temperature, fan speed, mode, etc. of the air conditioning equipment to the indoor controller 111 through buttons or displays on the control panel.

[0053] The indoor fan 112 is used to draw indoor air into the indoor unit of the air conditioner, cool or heat it through the evaporator, and then blow it back into the room to achieve indoor air circulation.

[0054] Optionally, the outdoor unit 120 includes a compressor 121, an outdoor fan 122, and an outdoor controller 123.

[0055] The outdoor controller 123 can be used to control the compressor 121 according to the user control command received by the indoor controller 111, so as to adjust the speed of the compressor 121.

[0056] In addition, the outdoor controller 123 can also be used to obtain the current speed of the compressor 121, calculate the target speed of the outdoor fan 122 based on the current speed of the compressor 121, and control the outdoor fan 122 based on the target speed of the outdoor fan 122 so that the speed of the outdoor fan 122 matches the speed of the compressor 121.

[0057] For example, a user can control the air conditioner 100 to turn on via a remote control, control panel, etc., and set the operating parameters of the air conditioner 100, including the working mode, target temperature, and fan speed of the indoor fan 122. After receiving the operating parameters set by the user, the indoor controller 111 starts the indoor fan 122 and simultaneously sends the operating parameters of the air conditioner 100 to the outdoor controller 123.

[0058] After receiving the operating parameters sent by the indoor controller 111, the outdoor controller 123 starts the compressor 121, the outdoor fan 122, and the outdoor controller 123 itself. The outdoor controller 123 adjusts the speed of the compressor 121 according to the aforementioned operating parameters. Simultaneously, the outdoor controller 123 acquires the current speed of the compressor 121 in real time and calculates the ideal speed of the outdoor fan 122 (the optimal energy-efficient fan speed, at which the air conditioning equipment has the highest energy efficiency) based on the current speed of the compressor 121. Then, it controls the outdoor fan 122 according to the ideal speed, enabling the outdoor fan 122 to quickly and accurately reach the ideal speed.

[0059] When the indoor temperature reaches the target temperature set by the user, the outdoor controller 123 adjusts the speed of the compressor 121. At the same time, based on the current speed of the compressor 121, it calculates the ideal speed of the outdoor fan 122 and controls the outdoor fan 122 according to the ideal speed. This cycle continues until the indoor temperature is stabilized at the target temperature.

[0060] During the entire operation of the air conditioning equipment 100, the outdoor controller 123 adjusts the speed of the compressor 121 according to user needs, calculates the ideal speed of the outdoor fan 122 based on the real-time detected speed of the compressor 121, and controls the outdoor fan 122 according to the ideal speed, thereby realizing the joint control of the compressor 121 and the outdoor fan 122.

[0061] As a core tool for regulating indoor temperature, the performance of air conditioning equipment directly affects the user's comfort experience. For example, in extreme weather conditions, such as scorching heat or freezing cold, it is necessary to quickly lower or raise the indoor temperature; or, when users have just returned home, they hope to quickly enjoy a comfortable indoor environment; or, when there are many people in the room, it is necessary to quickly adjust the indoor temperature to meet the needs of multiple people.

[0062] In order to achieve rapid cooling or heating in hot seasons or enclosed spaces, some air conditioning equipment has a "rampage mode" function. When this mode is turned on, the compressor of the air conditioning equipment will run at the maximum frequency or above the original rated frequency, thereby rapidly lowering or raising the indoor temperature in a short period of time.

[0063] Optionally, the above-mentioned "Rage Mode" may also be called "Power Mode", "Super Mode" or "Extreme Speed ​​Mode", etc., and no limitation is made in this embodiment of the invention.

[0064] In low-temperature, high-humidity environments, frost easily forms on the surface of the condenser fins when the air conditioner is in heating mode. The gradual accumulation of frost significantly reduces the heat exchange efficiency of the condenser, leading to a decrease in the air conditioner's heating capacity, a slow rise in indoor temperature, increased compressor load, and a shortened equipment lifespan.

[0065] Furthermore, if the frost is not dealt with promptly after it forms, the frost layer will thicken further, eventually requiring defrosting by stopping the machine or forcibly defrosting by running at high power. This will interrupt the heating process and reduce user comfort.

[0066] In related technologies, the frosting control of air conditioning equipment mainly relies on periodic defrosting strategies. For example, when the condenser coil temperature is detected to be continuously lower than a set threshold, a defrosting mode of fixed duration will be activated, which will force defrosting through reverse circulation or high-speed operation of the outdoor fan.

[0067] In summary, the outdoor fan of the air conditioner in the relevant technology usually operates at a fixed speed, which cannot dynamically adapt to the risk of frost formation. This results in a failure to intervene in time during the slight frost stage. When the frost layer becomes severe, the defrosting program is not only activated, but also affects the heating efficiency and wastes energy. In addition, the sudden increase in noise during defrosting (such as the fan running at high speed or the compressor restarting) will affect the user experience.

[0068] Therefore, under low temperature and high humidity conditions, how to use intelligent outdoor fan control strategies to promptly remove light frost in the early stages of frosting, while avoiding noise problems caused by frequent speed adjustments, has become a pressing technical problem that needs to be solved to improve the heating efficiency of air conditioners and user satisfaction.

[0069] To address the aforementioned technical problems, this invention provides an air conditioner outdoor fan control method. Through a multi-parameter linkage dynamic control strategy, the method enables intelligent adjustment of the outdoor fan speed in low-temperature and high-humidity environments. This allows for timely removal of light frost layers in the early stages of frosting and avoids noise and reliability issues caused by frequent speed adjustments.

[0070] Specifically, this technical solution dynamically determines whether there is a risk of frost by comprehensively considering ambient temperature, ambient humidity, air conditioning operating parameters, condenser coil temperature, etc. When there is a risk of frost, the speed of the outdoor fan is adjusted according to the preset control strategy, so as to promptly blow away the slight frost layer on the surface of the condenser fins. This not only improves heating efficiency, but also avoids affecting the user experience due to a sudden increase in noise during defrosting.

[0071] The technical solution of the present invention and how the technical solution of the present invention solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0072] Reference Figure 2 , Figure 2 This is a flowchart illustrating an air conditioner outdoor fan control method provided in an embodiment of the present invention.

[0073] In some embodiments, the above-mentioned air conditioner outdoor fan control method includes:

[0074] S201. Collect the first data, which includes ambient temperature data, ambient humidity data, air conditioning operation data, and condenser coil temperature data.

[0075] In some implementations, a temperature sensor can be used to detect the temperature of the environment where the outdoor unit of the air conditioner is located.

[0076] Optionally, the temperature sensor can be installed near the air inlet of the outdoor unit of the air conditioner to accurately reflect the actual temperature of the environment where the air conditioner is located.

[0077] In some implementations, a humidity sensor can be used to detect the humidity of the environment where the outdoor unit of the air conditioner is located.

[0078] Optionally, the humidity sensor mentioned above can be a capacitive humidity sensor or a resistive humidity sensor.

[0079] Optionally, the humidity sensor can be installed near the air inlet of the outdoor unit of the air conditioner to accurately reflect the actual humidity of the environment where the air conditioner is located.

[0080] In some implementations, ambient humidity can also be obtained by linking Internet of Things (IoT) devices or from Internet systems (such as smart home systems).

[0081] In some implementations, the aforementioned air conditioning operating data includes the air conditioning operating frequency, which can refer to the number of times the air conditioning compressor operates per unit time or the frequency parameter corresponding to the speed of the compressor. It directly reflects the operating power and heating capacity output of the air conditioning.

[0082] The higher the operating frequency of an air conditioner, the stronger its heating effect, but the higher its energy consumption; the lower the frequency, the more energy-efficient the air conditioner is, but the slower its heating speed.

[0083] In some implementations, the current operating frequency of the compressor can be directly read using the operating frequency reading interface provided with the air conditioner. For air conditioners that do not directly provide an operating frequency reading interface, the operating frequency can be indirectly calculated by collecting parameters such as compressor speed, current, and voltage, combined with the compressor model and performance curve.

[0084] In some implementations, thermocouple temperature sensors or resistance temperature sensors can be used to detect the temperature of the condenser coil.

[0085] The aforementioned thermocouple temperature sensor or resistance temperature sensor can be closely attached to the surface of the condenser coil to accurately measure the temperature of the condenser coil surface.

[0086] S202. Based on the first data, determine whether there is a risk of frost formation on the condenser. If yes, proceed to S203; otherwise, return to S201 and continue collecting the first data.

[0087] In some implementations, since the lower the ambient temperature, the greater the likelihood of frost formation, a temperature threshold (e.g., 2°C) can be set. When the collected ambient temperature is lower than this temperature threshold, it indicates that the current environment has the temperature conditions for frost formation, and further assessment of the frost risk is needed by combining other data.

[0088] Since ambient humidity reflects the water vapor content in the air, the higher the humidity, the greater the partial pressure of water vapor in the air. When the ambient temperature is below a certain threshold, water vapor is more likely to condense into frost on the condenser surface. Therefore, an ambient humidity threshold (such as 70%) can be set. When the ambient humidity is higher than this threshold, it indicates that the water vapor content in the air is high. Combined with low temperature conditions, the risk of frost formation increases. This risk can be further assessed by combining other data.

[0089] When an air conditioner operates at high frequencies, the refrigerant flow rate in the condenser increases, leading to a higher heat load and a faster drop in condenser surface temperature. Therefore, different operating frequency ranges can be set, such as low frequency (below 30Hz), medium frequency (30-60Hz), and high frequency (above 60Hz). When the air conditioner operates at high frequencies, combined with low temperature and high humidity environments, the risk of frosting can be further determined.

[0090] Since condenser coil temperature directly reflects the condenser surface temperature, lower coil temperatures make it easier for water vapor in the air to condense into frost. Therefore, a condenser coil temperature threshold (e.g., -1°C) can be set. When the condenser coil temperature falls below this threshold, it indicates that the condenser surface is already in a temperature range prone to frost formation. Combining this with data such as ambient temperature, humidity, and air conditioner operating frequency allows for a more accurate assessment of the risk of frost formation.

[0091] For example, when the ambient temperature is below 2°C, the ambient humidity is above 70%, the air conditioner operating frequency is above 60Hz, and the condenser coil temperature is below -1°C, it can be determined that there is a risk of frost formation on the condenser.

[0092] S203. Adjust the speed of the external fan according to the preset control strategy.

[0093] In some implementations, when a risk of frost formation is determined on the condenser, the speed of the external fan is adjusted according to a preset control strategy, for example, by immediately increasing the speed of the external fan to the maximum speed to blow away the light frost layer on the fin surface.

[0094] Understandably, in low-temperature, high-humidity environments, condenser fins are prone to frost formation due to the condensation of water vapor in the air. Initially, the frost layer is thin, and the outdoor fan load is low, with the current at a relatively low level. By significantly increasing the outdoor fan speed, the airflow velocity and intensity between the fins are enhanced, using high-speed airflow to blow away the light frost layer on the fin surface, thus preventing further thickening. This maximizes the high-power heating time while ensuring the normal operation of the air conditioning system, improving heating efficiency, and simultaneously avoiding excessive noise from prolonged high-speed fan operation, which could negatively impact user experience.

[0095] The air conditioner outdoor fan control method provided in this embodiment of the invention dynamically judges whether there is a risk of frost formation on the condenser by comprehensively considering data such as ambient temperature, ambient humidity, air conditioner operating parameters, and condenser coil temperature. When there is a risk of frost formation, the speed of the outdoor fan is adjusted according to the preset control strategy, so as to promptly blow away the slight frost layer on the surface of the condenser fins. This not only improves heating efficiency but also avoids affecting the user experience due to a sudden increase in noise during defrosting.

[0096] Reference Figure 3 , Figure 3 This is another flowchart illustrating an air conditioner outdoor fan control method provided in an embodiment of the present invention.

[0097] In some embodiments, the above-mentioned air conditioner outdoor fan control method includes:

[0098] S301. Determine whether the air conditioner meets the conditions for entering the first operating mode. If yes, continue to execute S302; otherwise, maintain the current control strategy.

[0099] In the first operating mode, the operating frequency of the air conditioner compressor is greater than a first frequency threshold, which is the maximum operating frequency of the compressor in other operating modes besides the first operating mode.

[0100] Optionally, the first working mode described above may also be called "frenzy mode", "powerful mode", "super strong mode" or "high-speed operation mode", etc., and no limitation is made in this embodiment of the invention.

[0101] Optionally, when the air conditioning equipment enters the first working mode, the speed of the air conditioning equipment's fan (including the indoor fan and / or the outdoor fan) can be adjusted to make the fan speed greater than the preset speed, which is the maximum speed at which the fan operates in other working modes besides the first working mode.

[0102] Among these, the other operating modes can be those that meet noise requirements. For example, other operating modes may include gentle breeze mode, normal cooling / heating mode, and the highest fan speed setting. When the air conditioning unit is in any of these other operating modes, the noise generated by the air conditioning unit must be less than the preset noise level.

[0103] For example, the indoor unit of an air conditioner is preset to 42 decibels and the outdoor unit is preset to 52 decibels. When the air conditioner is turned on in other operating modes, the compressor and indoor and outdoor fans will generate noise, but the operating noise of the indoor and outdoor units will still be within the preset noise range of the indoor unit and the outdoor unit, respectively.

[0104] Among them, the indoor unit preset noise and the outdoor unit preset noise can refer to the indoor unit noise value and the outdoor unit noise value marked on the nameplate of the air conditioning equipment in accordance with the national standard testing standards.

[0105] In some embodiments, when the compressor's operating frequency is greater than a first frequency threshold, it indicates that the present invention addresses a first operating mode of the air conditioning device. Specifically, the first frequency threshold is not the physical limit frequency that the compressor's hardware structure can withstand, but rather the maximum frequency among the normal frequencies set by the air conditioning device in other operating modes to balance daily energy efficiency, equipment wear and tear, and operating noise. This normal frequency is based on scenarios of stable operation rather than extreme performance.

[0106] For example, assuming that the maximum frequency of the air conditioner's compressor when operating in other working modes is 120Hz, then the first working mode is the working mode in which the air conditioner's compressor operates at a frequency greater than 120Hz.

[0107] Understandably, the compressor's operating frequency exceeding the first frequency threshold is a core characteristic of the aforementioned first operating mode. This is because the primary requirement of the first operating mode is to rapidly reduce the temperature difference between indoors and outdoors. Therefore, it needs to overcome the frequency limitations of the normal mode, allowing the compressor to operate at a higher frequency to maximize cooling / heating capacity. In other words, the first operating mode can overcome noise limitations to achieve maximum cooling or heating effect. This ensures that while the compressor's operating frequency exceeds the conventional upper limit, it remains below the compressor's hardware limits, achieving a balance between high frequency, high efficiency, and operational safety, precisely matching the usage scenarios of the first operating mode.

[0108] For example, suppose that in operating modes other than the first operating mode, the highest operating frequency of the compressor at maximum load is n1, and in the first operating mode, the compressor operating frequency is n2. Then, under the same operating conditions, n2>n1.

[0109] Where n1 is less than the upper frequency limit indicated on the compressor nameplate, and n2 is less than or equal to the upper frequency limit indicated on the compressor nameplate. For example, in operating modes other than the first operating mode, taking a certain model of air conditioner as an example, in cooling mode, n1 is 80Hz-90Hz, and in heating mode, n1 is 100Hz-110Hz. In the first operating mode, in cooling mode, n2 is 91Hz-140Hz, and in heating mode, n2 is 111Hz-140Hz.

[0110] Taking a 1.5 horsepower air conditioner as an example, in all operating modes except the first operating mode, the compressor operates at a maximum frequency of 108 Hz when at maximum load, reaching 77% of the upper limit of the compressor nameplate frequency. In the first operating mode, the compressor is allowed to operate at a frequency exceeding 108 Hz, but less than or equal to 140 Hz. That is, in the first operating mode, the compressor's maximum operating frequency can reach 100% of the upper limit of the compressor nameplate frequency.

[0111] The first operating mode can overcome the limitations of other operating modes, with at least one of the operating frequency and fan speed exceeding the preset value, or both. However, compared to other operating modes, it is closer to the hardware limits of the compressor and fan. Prolonged operation may cause the temperature of electrical components and control systems to exceed the limits. Therefore, within the design margin, the first operating mode can be allowed to run for 5 to 60 minutes before exiting. The running time of the first operating mode can be set by the user or left as a default value.

[0112] It is understandable that when the air conditioner is turned on for heating, the condenser acts as the evaporator to absorb heat. In low temperature and high humidity environments, the surface temperature of the evaporator is easily lower than the dew point temperature of the surrounding air, or even lower than 0°C, causing water vapor in the air to condense into frost on the surface of the evaporator.

[0113] After the air conditioner turns on its heating function and enters its first working mode, the condenser (evaporator) needs to complete a large amount of heat exchange in a short period of time, which will cause the surface temperature of the evaporator to drop rapidly, increasing the probability of frost formation.

[0114] S302. Collect the first data, which includes ambient temperature data, ambient humidity data, air conditioner operation data, and condenser coil temperature data.

[0115] S303. Based on the first data, determine whether there is a risk of frost formation on the condenser.

[0116] S304. When there is a risk of condensation on the condenser, adjust the speed of the outdoor fan according to the preset control strategy.

[0117] The content described in steps S302 to S304 above can be referred to the content described in steps 201 to 203 in the above embodiments, and will not be repeated here.

[0118] In this embodiment of the invention, when it is determined that the conditions for entering the first working mode are met, first data is collected, and based on the first data, it is determined whether there is a risk of frost formation on the condenser. When there is a risk of frost formation on the condenser, the speed of the external fan is adjusted according to the preset control strategy, so as to blow away the slight frost layer on the surface of the condenser fins in time, which can not only improve the heating efficiency, but also avoid affecting the user experience due to the sudden increase in noise during defrosting.

[0119] In some embodiments, a risk of frost formation on the condenser is determined when the first data described above meets the following conditions:

[0120] (1) The ambient temperature data is less than the first temperature threshold.

[0121] Optionally, the first temperature threshold includes the condenser's frosting critical temperature; when the ambient temperature is below this frosting critical temperature, water vapor in the air will condense into frost on the condenser surface.

[0122] In particular, when the ambient temperature is low, the condenser surface temperature is more likely to drop below the dew point temperature, thus providing the temperature conditions for water vapor to condense into frost. For example, when the ambient temperature is below 5°C, the likelihood of condenser frosting increases significantly.

[0123] (2) The ambient humidity data is greater than or equal to the preset humidity threshold.

[0124] The higher the ambient humidity, the more water vapor there is in the air, and the easier it is for a large amount of water vapor to condense into frost when the surface temperature of the condenser decreases.

[0125] (3) The air conditioner operating frequency is greater than or equal to the preset frequency threshold.

[0126] When an air conditioner operates at a higher frequency, the refrigerant circulates faster in the system, the heat exchange of the condenser increases, and its surface temperature may drop more quickly, thus increasing the risk of frost formation.

[0127] (4) The condenser coil temperature data is less than the second temperature threshold within the preset duration; the second temperature threshold is determined based on the ambient temperature data and ambient humidity data.

[0128] In some implementations, a second temperature threshold can be determined based on the current ambient temperature and a fixed ambient humidity (e.g., 80%).

[0129] Under the same humidity conditions, the higher the ambient temperature, the more water vapor the air can hold. Therefore, a lower ambient temperature is required for the air to reach saturation (i.e., the dew point temperature). Thus, the higher the current ambient temperature, the higher the aforementioned second temperature threshold.

[0130] For example, the second temperature threshold T2 can be determined in the following manner:

[0131] T2=T 环 −k⋅(1−RH)+C;

[0132] Among them, T 环 The current ambient temperature is represented by , k represents the humidity influence coefficient, RH represents the current ambient humidity, and C represents a constant term.

[0133] If the condenser coil temperature remains below the frosting temperature calculated based on ambient temperature and humidity for a period of time (e.g., 30 seconds), then the condenser is at risk of frosting. For example, in a low-temperature, high-humidity environment, the calculated frosting temperature is relatively low. If the coil temperature remains below this value, it indicates a high risk of frosting.

[0134] In this embodiment of the invention, a dynamic control strategy involving multiple parameters (ambient temperature, humidity, condenser tube temperature, fan current, and fan module temperature) is used to assess the risk of frosting in real time, which can improve the accuracy of frosting prediction and avoid control lag caused by misjudgment of a single parameter.

[0135] In some embodiments, adjusting the speed of the external fan according to a preset control strategy includes:

[0136] Every first time interval, the speed of the outdoor fan is adjusted to the first speed; after the outdoor fan runs at the first speed for a second time interval, the outdoor fan current and / or the outdoor fan drive module temperature are monitored; the speed of the outdoor fan is adjusted according to the outdoor fan current and / or the outdoor fan drive module temperature.

[0137] In some implementations, the first rotational speed can be the maximum rotational speed of the external fan.

[0138] For example, if it is determined that there is a risk of frost formation on the condenser, the speed of the outdoor fan can be adjusted to the maximum speed every first duration (e.g., 10 minutes) and the outdoor fan can be run at the maximum speed for a second duration (e.g., 30 seconds), thereby enabling the outdoor fan to blow away the light frost layer on the surface of the condenser fins.

[0139] After the outdoor fan has been running at its maximum speed for a second period of time, monitor the outdoor fan current and / or the outdoor fan drive module temperature, and adjust the outdoor fan speed according to the outdoor fan current and / or the outdoor fan drive module temperature.

[0140] In some implementations, when the external fan current is less than the external fan demagnetization protection current and / or the external fan drive module temperature is less than the external fan demagnetization protection temperature, the external fan can be kept running at its maximum speed. When the external fan runs at its maximum speed for a duration greater than or equal to the fifth duration, the speed of the external fan is restored to the reference speed.

[0141] The reference speed is the speed of the external fan before it is adjusted according to the control strategy.

[0142] In some implementations, when the external fan current is greater than or equal to the external fan demagnetization protection current, and / or the external fan drive module temperature is greater than or equal to the external fan demagnetization protection temperature, the speed of the external fan is reduced every fourth time interval by a second adjustment range (e.g., a 5% decrease each time) until the external fan current is less than the external fan demagnetization protection current, and / or the external fan drive module temperature is less than the external fan demagnetization protection temperature.

[0143] In some implementations, the first rotational speed is determined based on the maximum rotational speed of the external fan. For example, the first rotational speed may be greater than 80% of the maximum rotational speed of the external fan, but less than the maximum rotational speed of the external fan.

[0144] In some embodiments, if the first rotational speed can be greater than 80% of the maximum rotational speed of the external fan and less than the maximum rotational speed of the external fan, after the external fan has been running at the first rotational speed for a second period of time, if the external fan current is less than the external fan demagnetization protection current and / or the external fan drive module temperature is less than the external fan demagnetization protection temperature, then every third period of time, the rotational speed of the external fan is increased by a first adjustment range (e.g., 2%).

[0145] If, after the outdoor fan has been running at its maximum speed for a second period of time, the outdoor fan current is less than the outdoor fan demagnetization protection current, and / or the outdoor fan drive module temperature is less than the outdoor fan demagnetization protection temperature, it means that the outdoor fan has not yet reached its limit. In this case, the outdoor fan speed can be increased every third period of time (e.g., 30 seconds) according to the first adjustment range. This can ensure the reliability of the outdoor fan motor while increasing the outdoor fan speed as much as possible to blow away the slight frost layer on the surface of the condenser fins.

[0146] When the outdoor fan operates at a speed greater than or equal to the first speed for a duration greater than or equal to the fifth duration, the speed of the outdoor fan is restored to the reference speed to ensure the reliability of the outdoor fan.

[0147] When the current of the external fan is greater than or equal to the demagnetization protection current of the external fan, and / or the temperature of the external fan drive module is greater than or equal to the demagnetization protection temperature of the external fan, the speed of the external fan is reduced by the second adjustment range every fourth time interval until the current of the external fan is less than the demagnetization protection current of the external fan, and / or the temperature of the external fan drive module is less than the demagnetization protection temperature of the external fan, so as to ensure the reliability of the external fan.

[0148] In this embodiment of the invention, by predicting changes in the load of the external fan, preventative control strategies are implemented in advance to ensure that the external fan operates within a safe range, reducing equipment damage caused by sudden load fluctuations. Simultaneously, by optimizing the speed increase strategy, the frost removal effect is maximized while ensuring safety, reducing energy waste and noise problems caused by frequent speed adjustments.

[0149] The air conditioner outdoor fan control method provided in this embodiment of the invention predicts whether there is a risk of frost formation on the condenser through multi-parameter linkage, and can achieve the following beneficial effects:

[0150] Extend the duration of high-power heating: When there is a risk of frost buildup on the condenser, the light frost layer can be removed in time by controlling the outdoor fan to run at high speed for short periods of time. This avoids the decrease in heat exchange efficiency caused by frost accumulation, thereby reducing the number of times the unit needs to be shut down for defrosting.

[0151] Reduce noise and energy consumption: Increase speed only when necessary, and avoid prolonged high-speed operation by dynamically adjusting the speed range, thereby reducing sudden noise increases and energy waste.

[0152] Improve equipment reliability: By combining fan current and module temperature monitoring, the system automatically reduces speed when the load is abnormal, preventing motor demagnetization or overheating damage and extending equipment life.

[0153] Optimize user experience: Intelligent control balances defrosting effect and noise issues, reduces user perception of heating interruption, and improves comfort and satisfaction.

[0154] In some embodiments, the present invention also provides an air conditioner outdoor fan control device. (Refer to...) Figure 4 , Figure 4 This is a schematic diagram of the structure of an air conditioner outdoor fan control device provided in an embodiment of the present invention. The air conditioner outdoor fan control device 40 includes:

[0155] The data acquisition module 401 is used to acquire first data, which includes ambient temperature data, ambient humidity data, air conditioner operation data, and condenser coil temperature data.

[0156] The determination module 402 is used to determine whether there is a risk of frost formation on the condenser based on the first data.

[0157] The control module 403 is used to adjust the speed of the external fan according to a preset control strategy when there is a risk of frost formation on the condenser.

[0158] The above-mentioned adjustment of the external fan speed according to the preset control strategy includes:

[0159] Every first time interval, the speed of the outdoor fan is adjusted to the first speed; after the outdoor fan runs at the first speed for a second time interval, the outdoor fan current and / or the outdoor fan drive module temperature are monitored; the speed of the outdoor fan is adjusted according to the outdoor fan current and / or the outdoor fan drive module temperature.

[0160] In one possible implementation, the acquisition module 401 is used for:

[0161] Determine whether the air conditioner meets the conditions for entering the first working mode; in the first working mode, the operating frequency of the air conditioner's compressor is greater than a first frequency threshold, which is the maximum operating frequency of the compressor in other working modes besides the first working mode; when the conditions for entering the first working mode are met, collect the first data.

[0162] In one possible implementation, the air conditioning operation data includes the air conditioning operating frequency, and the determining module 402 is used for:

[0163] The condenser is considered to be at risk of frosting when the first data meets the following conditions:

[0164] The ambient temperature data is lower than the first temperature threshold; the first temperature threshold includes the critical temperature for condenser to freeze.

[0165] The ambient humidity data is greater than or equal to the preset humidity threshold;

[0166] The air conditioner's operating frequency is greater than or equal to the preset frequency threshold;

[0167] The condenser coil temperature data is lower than the second temperature threshold within a preset duration; the second temperature threshold is determined based on ambient temperature and humidity data.

[0168] In one possible implementation, the control module 403 is used for:

[0169] When the current of the external fan is less than the demagnetization protection current of the external fan, and / or the temperature of the external fan drive module is less than the demagnetization protection temperature of the external fan, the speed of the external fan is increased by the first adjustment range every third time interval.

[0170] In one possible implementation, the control module 403 is used for:

[0171] When the current of the external fan is greater than or equal to the demagnetization protection current of the external fan, and / or the temperature of the external fan drive module is greater than or equal to the demagnetization protection temperature of the external fan, the speed of the external fan is reduced by the second adjustment range every fourth time interval until the current of the external fan is less than the demagnetization protection current of the external fan, and / or the temperature of the external fan drive module is less than the demagnetization protection temperature of the external fan.

[0172] In one possible implementation, the control module 403 is further configured to:

[0173] When the outdoor fan operates at a speed greater than or equal to the first speed for a duration greater than or equal to the fifth duration, the speed of the outdoor fan will be restored to the reference speed; the reference speed is the speed of the outdoor fan before it was adjusted according to the control strategy.

[0174] The air conditioner outdoor fan control device provided in this embodiment can execute the air conditioner outdoor fan control method provided in the above method embodiment. Its implementation principle and technical effect are similar, and will not be described in detail here.

[0175] Reference Figure 5 , Figure 5 This is a schematic diagram of the hardware structure of an air conditioning device provided in an embodiment of the present invention. Figure 5 As shown, the air conditioning device 50 provided in this embodiment includes at least one processor 501 and a memory 502.

[0176] Optionally, the air conditioning device 50 also includes a communication interface 503. The processor 501, memory 502, and communication interface 503 are connected via a bus.

[0177] In the specific implementation process, at least one processor 501 executes computer execution instructions stored in memory 502, causing at least one processor 501 to execute the air conditioner outdoor fan control method described in the above embodiments.

[0178] The specific implementation process of processor 501 can be found in the above method embodiments, and its implementation principle and technical effect are similar. It will not be repeated here.

[0179] In the above embodiments, it should be understood that the processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), etc. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in this invention can be directly manifested as being executed by a hardware processor, or executed by a combination of hardware and software modules within the processor.

[0180] The memory may include random access memory (RAM) and may also include non-volatile memory (NVM), such as at least one disk storage device.

[0181] The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of illustration, the buses shown in the accompanying drawings are not limited to a single bus or a single type of bus.

[0182] The present invention also provides a computer program product, including a computer program that, when executed by a processor, implements the air conditioner outdoor fan control method described in the above embodiments.

[0183] The present invention also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, implement the above-described air conditioner outdoor fan control method.

[0184] The aforementioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium can be any available medium accessible to a general-purpose or special-purpose computer.

[0185] An exemplary readable storage medium is coupled to a processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can reside in an application-specific integrated circuit (ASIC). Alternatively, the processor and the readable storage medium can exist as discrete components in the device.

[0186] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0187] Those skilled in the art will understand that all or part of the steps of the above-described method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments; and the aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.

Claims

1. A method for controlling an outdoor fan of an air conditioner, characterized in that, The method includes: Collect first data, which includes ambient temperature data, ambient humidity data, air conditioner operation data, and condenser coil temperature data; Based on the first data, determine whether there is a risk of frost formation on the condenser; When there is a risk of frost formation on the condenser, the speed of the external fan is adjusted according to a preset control strategy; The step of adjusting the speed of the external fan according to a preset control strategy includes: Every first time interval, the speed of the outdoor fan is adjusted to a first speed; after the outdoor fan runs at the first speed for a second time interval, the outdoor fan current and / or the outdoor fan drive module temperature are monitored; the speed of the outdoor fan is adjusted according to the outdoor fan current and / or the outdoor fan drive module temperature.

2. The method according to claim 1, characterized in that, The first data collection includes: Determine whether the air conditioner meets the conditions for entering the first working mode; in the first working mode, the operating frequency of the air conditioner's compressor is greater than a first frequency threshold, the first frequency threshold being the maximum operating frequency of the compressor in other working modes besides the first working mode; When the conditions for entering the first working mode are met, the first data is collected.

3. The method according to claim 1 or 2, characterized in that, The air conditioner operating data includes the air conditioner operating frequency. Determining whether the condenser is at risk of frosting based on the first data includes: The condenser is determined to be at risk of frosting when the first data meets the following conditions: The ambient temperature data is less than a first temperature threshold; the first temperature threshold includes the critical frosting temperature of the condenser. The ambient humidity data is greater than or equal to a preset humidity threshold. The air conditioner's operating frequency is greater than or equal to a preset frequency threshold; The condenser coil temperature data is less than a second temperature threshold within a preset duration; the second temperature threshold is determined based on the ambient temperature data and the ambient humidity data.

4. The method according to claim 1, characterized in that, The step of adjusting the speed of the external fan based on the external fan current and / or the external fan drive module temperature includes: When the current of the external fan is less than the demagnetization protection current of the external fan, and / or the temperature of the external fan drive module is less than the demagnetization protection temperature of the external fan, the speed of the external fan is increased by the first adjustment range every third time interval.

5. The method according to claim 1, characterized in that, The step of adjusting the speed of the external fan based on the external fan current and / or the external fan drive module temperature includes: When the current of the external fan is greater than or equal to the demagnetization protection current of the external fan, and / or the temperature of the external fan drive module is greater than or equal to the demagnetization protection temperature of the external fan, the speed of the external fan is reduced by the second adjustment range every fourth time interval until the current of the external fan is less than the demagnetization protection current of the external fan, and / or the temperature of the external fan drive module is less than the demagnetization protection temperature of the external fan.

6. The method according to claim 4, characterized in that, The method further includes: When the duration of operation of the external fan at a speed greater than or equal to the first speed is greater than or equal to the fifth duration, the speed of the external fan is restored to the reference speed; the reference speed is the speed of the external fan before it was adjusted according to the control strategy.

7. An air conditioner outdoor fan control device, characterized in that, include: The data acquisition module is used to acquire first data, which includes ambient temperature data, ambient humidity data, air conditioner operation data, and condenser coil temperature data. The determination module is used to determine whether there is a risk of frost formation on the condenser based on the first data; The control module is used to adjust the speed of the external fan according to a preset control strategy when there is a risk of frost formation on the condenser. The step of adjusting the speed of the external fan according to a preset control strategy includes: Every first time interval, the speed of the external fan is adjusted to the first speed; After the outdoor fan has been running at the first speed for a second period of time, the outdoor fan current and / or the outdoor fan drive module temperature are monitored; the outdoor fan speed is adjusted according to the outdoor fan current and / or the outdoor fan drive module temperature.

8. An air conditioning device, characterized in that, include: Memory, processor; The memory stores computer-executed instructions; The processor executes computer execution instructions stored in the memory, causing the processor to perform the air conditioner outdoor fan control method as described in any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the air conditioner outdoor fan control method as described in any one of claims 1-6.

10. A computer program product, characterized in that, It includes a computer program that, when executed by a processor, implements the air conditioner outdoor fan control method as described in any one of claims 1-6.

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