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

Abstract

The embodiment of the invention provides an air conditioner external fan control method and device and air conditioning equipment, and relates to the technical field of air conditioners. The first working mode is a working mode in which a compressor of the air conditioner operates at a frequency greater than a first frequency threshold value, and the first frequency threshold value is the maximum operating frequency of the compressor in other working modes except the first working mode; under the condition that the condition of entering the first working mode is met, the rotating speed of an outer fan of the air conditioner is adjusted to the first rotating speed; and when the running duration of the outer fan at the first rotating speed is larger than a preset duration threshold value, or the exhaust pressure of a compressor of the air conditioner is smaller than a preset pressure threshold value, the rotating speed of the outer fan is adjusted according to the exhaust pressure. According to the technical scheme provided by the embodiment of the invention, the heat dissipation capability of the air conditioner condenser can be improved.

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] As a core tool for regulating temperature, the performance of air conditioners directly affects the user's comfort experience, especially during hot seasons or in enclosed spaces, where users have a particularly urgent need for the cooling capacity of air conditioners.

[0003] In related technologies, the speed adjustment of the outdoor fan of an air conditioner is usually based on the current operating mode or environmental parameters (such as indoor / outdoor temperature). For example, in normal mode, the outdoor fan runs at the lowest speed to save energy, and the speed is gradually increased only when an increase in the condenser's heat dissipation demand is detected.

[0004] However, when an air conditioner needs to increase the compressor frequency and cooling output in a short period of time, the adjustment of the outdoor fan speed often lags behind the changes in system load, resulting in insufficient heat dissipation capacity of the condenser, which in turn leads to problems such as compressor overload and excessively high exhaust temperature. Summary of the Invention

[0005] This invention provides a method, apparatus, and air conditioning equipment for controlling an air conditioner's outdoor fan, which can help improve the heat dissipation capacity of the air conditioner's condenser.

[0006] In a first aspect, the present invention provides a method for controlling an outdoor fan of an air conditioner, the method comprising:

[0007] Determine whether the conditions for entering the first working mode are met; the first working mode is the working mode in which the air conditioner compressor operates at a frequency greater than a first frequency threshold, and the first frequency threshold is the maximum frequency at which the compressor operates in other working modes besides the first working mode.

[0008] If the conditions for entering the first working mode are met, the speed of the air conditioner's outdoor fan is adjusted to the first speed; the first speed is greater than the preset speed, which is the maximum speed at which the outdoor fan operates in other working modes besides the first working mode;

[0009] When the duration of operation of the outdoor fan at the first speed exceeds the preset duration threshold, or when the discharge pressure of the compressor is less than the preset pressure threshold, the speed of the outdoor fan is adjusted according to the discharge pressure.

[0010] In one possible implementation, determining whether the conditions for entering the first operating mode are met includes:

[0011] Collect first data, which includes at least one of the following: user operation data, air conditioning operation data, and ambient temperature data;

[0012] Based on the first data, determine whether the conditions for entering the first working mode are met.

[0013] In one possible implementation, the aforementioned air conditioning operating data includes the compressor's operating frequency;

[0014] The above-mentioned determination of whether the conditions for entering the first working mode are met based on the first data includes:

[0015] The condition for entering the first working mode is determined to be met when the first data satisfies at least one of the following:

[0016] The user operation data includes the startup operation information for the first working mode;

[0017] The compressor's target frequency is greater than the current operating frequency, and the difference between the target frequency and the current operating frequency is greater than a preset threshold.

[0018] The detected change in ambient temperature within a preset time period is greater than a preset change threshold.

[0019] The detected ambient temperature is higher than the preset temperature threshold.

[0020] In one possible implementation, adjusting the speed of the external fan according to the exhaust pressure includes:

[0021] Calculate the deviation between the exhaust pressure and the preset target pressure threshold;

[0022] Based on the deviation value, the speed of the external fan is adjusted using the proportional-integral-derivative (PID) algorithm.

[0023] In one possible implementation, the above method further includes:

[0024] The PID parameters of the PID algorithm are selected based on the frequency range to which the compressor operates; different frequency ranges correspond to different PID parameters.

[0025] In one possible implementation, the above method further includes:

[0026] The compressor's discharge pressure is detected using a pre-set pressure sensor;

[0027] Alternatively, obtain the outlet pipe temperature of the air conditioner's condenser, and determine the compressor's discharge pressure based on the outlet pipe temperature.

[0028] In a second aspect, the present invention provides an air conditioner outdoor fan control device, comprising:

[0029] The determining module is used to determine whether the conditions for entering the first working mode are met; the first working mode is the working mode in which the air conditioner compressor operates at a frequency greater than a first frequency threshold, and the first frequency threshold is the maximum frequency at which the compressor operates in other working modes besides the first working mode.

[0030] The control module is used to adjust the speed of the outdoor fan of the air conditioner to a first speed when the conditions for entering the first working mode are met; the first speed is greater than the preset speed, which is the maximum speed at which the outdoor fan operates in other working modes besides the first working mode; when the outdoor fan runs at the first speed for a longer period than a preset time threshold, or when the compressor's exhaust pressure is less than a preset pressure threshold, the speed of the outdoor fan is adjusted according to the exhaust pressure.

[0031] Thirdly, the present invention provides an air conditioning device, the air conditioner including a memory and a processor;

[0032] The memory stores instructions that the computer executes;

[0033] 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.

[0034] 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.

[0035] 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.

[0036] The air conditioner outdoor fan control method, device, and air conditioning equipment provided by the present invention can improve the condenser heat dissipation capacity in advance by controlling the outdoor fan to run at a first speed when the air conditioner meets the conditions for entering the first working mode. When the duration of the outdoor fan running at the first speed is greater than a preset duration threshold, or the exhaust pressure of the compressor is less than a preset pressure threshold, the control switches to closed-loop control based on exhaust pressure, thereby achieving a balance between rapid response, stable output, and system safety. Attached Figure Description

[0037] 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.

[0038] Figure 1 This is a schematic diagram of the structure of an air conditioner provided in an embodiment of the present invention;

[0039] Figure 2 This is a flowchart illustrating an air conditioner outdoor fan control method provided in an embodiment of the present invention;

[0040] Figure 3 This is another flowchart illustrating an air conditioner outdoor fan control method provided in an embodiment of the present invention;

[0041] 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;

[0042] Figure 5 This is a schematic diagram of the structure of an air conditioning device provided in an embodiment of the present invention.

[0043] 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

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] For example, refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of an air conditioner provided in an embodiment of the present invention.

[0049] In some implementations, the air conditioner 100 includes an indoor unit 110 and an outdoor unit 120.

[0050] Optionally, the indoor unit 110 includes an indoor controller 111 and an indoor fan 112.

[0051] The indoor controller 111 is used to receive control commands from users. For example, users can send control commands such as air conditioner temperature, fan speed, and mode to the indoor controller 111 via buttons or displays on the control panel.

[0052] 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.

[0053] Optionally, the outdoor unit 120 includes a compressor 121, an outdoor fan 122, and an outdoor controller 123.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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 optimal speed of the outdoor fan 122 (the optimal energy-efficient fan speed, at which the air conditioner's energy efficiency is maximized) based on the current speed of the compressor 121. Then, it controls the outdoor fan 122 according to the optimal speed, enabling the outdoor fan 122 to quickly and accurately reach the optimal speed.

[0058] 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 optimal speed of the outdoor fan 122 and controls the outdoor fan 122 according to the optimal speed. This cycle continues until the indoor temperature is stabilized at the target temperature.

[0059] During the entire operation of the air conditioner 100, the outdoor controller 123 adjusts the speed of the compressor 121 according to the user's needs, calculates the optimal 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 optimal speed, thereby realizing the joint control of the compressor 121 and the outdoor fan 122.

[0060] In modern homes and offices, air conditioning is a core tool for regulating indoor temperature, and its performance directly impacts user comfort. This is especially true during hot seasons or in enclosed spaces, where users have a pressing need for rapid cooling capabilities from their air conditioners.

[0061] 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 want to quickly enjoy a comfortable indoor environment; or, when there are many people indoors, 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 conditioners have a "rampage mode" function. When this mode is turned on, the air conditioner's compressor 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 related technologies, when a user triggers the "frenzy mode" of an air conditioner, the air conditioner needs to output maximum cooling capacity in a very short time to quickly reduce the indoor temperature. However, this high-load operation mode is often accompanied by a sharp increase in system pressure, high and low pressure difference, and instantaneous current, which causes key components such as the compressor and outdoor fan to be subjected to greater mechanical and electrical stress, posing potential reliability risks, such as compressor overload and reduced condenser heat dissipation efficiency.

[0065] Existing air conditioning control logic typically adjusts the speed of the outdoor fan gradually based on the external environment when the user actively triggers "Raging Mode," resulting in the inability to improve heat dissipation capacity in advance. The "Raging Mode" response time is delayed, making it difficult to meet the user's immediate need for rapid cooling.

[0066] For example, in existing air conditioning control technology, the speed adjustment of the outdoor fan is usually based on the current operating mode or temperature parameters (such as indoor / outdoor temperature, evaporator / condenser temperature) and is performed in an open-loop control manner. In normal operating mode, the air conditioner collects temperature data and adjusts the compressor frequency and outdoor fan speed in combination with a preset control algorithm to maintain the target temperature.

[0067] For example, in normal mode, the outdoor fan runs at the lowest speed to save energy, and the speed of the outdoor fan is gradually increased only when an increase in the heat dissipation demand of the condenser is detected.

[0068] However, when users switch to "violent mode", the air conditioner needs to increase the compressor frequency and increase the cooling output in a short period of time. At this time, the adjustment of the outdoor fan speed often lags behind the changes in system load, resulting in insufficient heat dissipation capacity of the condenser, which in turn causes problems such as compressor overload and excessively high exhaust temperature.

[0069] Furthermore, the lack of predictive control in the relevant technology means that when the user triggers "Rampage Mode," the cooling system remains in a passive response state, making it difficult to improve cooling capacity in advance.

[0070] Therefore, how to dynamically adjust the speed of the outdoor fan to improve the air conditioner's heat dissipation capacity in advance when the "frenzy mode" is activated has become a pressing technical problem that needs to be solved.

[0071] To address the aforementioned technical problems, this invention provides an air conditioner outdoor fan control method. When the air conditioner meets the conditions for entering the first working mode, the outdoor fan can be controlled to run at a first speed in advance, thereby improving the condenser's heat dissipation capacity. When the duration of the outdoor fan running at the first speed exceeds a preset duration threshold, or when the compressor's exhaust pressure is less than a preset pressure threshold, the system switches to closed-loop control based on exhaust pressure, thereby achieving a balance between rapid response, stable output, and system safety in the high-speed mode.

[0072] 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.

[0073] 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.

[0074] In some embodiments, the above-mentioned air conditioner outdoor fan control method includes:

[0075] S201. Determine if the conditions for entering the first working mode are met. If yes, continue to S202.

[0076] Wherein, the first working mode is the working mode in which the compressor of the air conditioning equipment operates at a frequency greater than a first frequency threshold; the first frequency threshold is the maximum frequency at which the compressor operates in other working modes besides the first working mode.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] Where n1 is less than the upper limit of the frequency indicated on the compressor nameplate, and n2 is less than or equal to the upper limit of the frequency 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.

[0086] 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.

[0087] 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.

[0088] In some implementations, first data may be collected, and based on the first data, it may be determined whether the air conditioner meets the conditions for entering the first operating mode.

[0089] Optionally, the first data includes at least one of the following: user operation data, air conditioning operation data, ambient temperature data, etc.

[0090] For example, based on the first data, it can be determined whether the user has triggered the first working mode mentioned above. If so, it can be determined that the conditions for entering the first working mode are met.

[0091] Alternatively, based on the first data, it can be determined whether the compressor frequency of the air conditioner is rapidly increasing; if so, then the conditions for entering the first working mode are met.

[0092] Alternatively, based on the first data, it can be determined whether the ambient temperature is high; if so, then the conditions for entering the first working mode are met.

[0093] S202. Adjust the speed of the outdoor fan of the air conditioner to the first speed.

[0094] In some implementations, when it is determined that the air conditioner meets the conditions for entering the first operating mode, the speed of the outdoor fan can be actively adjusted directly from the current speed to the first speed, thereby improving the heat dissipation capacity of the condenser in advance.

[0095] The first speed is greater than the preset speed, which is the maximum speed at which the external fan operates in other working modes besides the first working mode.

[0096] For example, when there is a large temperature difference between indoors and outdoors, or when users need to quickly adjust the indoor temperature, the compressor needs to operate at its maximum frequency to rapidly change the indoor temperature. In this case, adjusting the outdoor fan speed to the first speed, rather than gradually adjusting it to the first speed, can improve the condenser's heat dissipation capacity, allowing the refrigerant to condense fully and ensuring the smooth operation of the cooling / heating cycle, thereby reaching the set indoor temperature more quickly.

[0097] S203. Determine whether the duration of the outdoor fan running at the first speed is greater than the preset duration threshold, or whether the compressor's exhaust pressure is less than the preset pressure threshold; if yes, continue to execute S204; if no, return to execute S202 and control the air conditioner's outdoor fan to maintain the first speed.

[0098] In some implementations, after the speed of the outdoor fan of the air conditioner is adjusted to a first speed, an internal timer can start working to record the time for the outdoor fan to run continuously at that speed.

[0099] Optionally, the aforementioned preset duration threshold can be determined based on the air conditioner's design parameters, operating environment, and experimental data. For example, under normal operating conditions, it can be set to 5-30 minutes.

[0100] When the duration of operation of the external fan at the first speed exceeds the preset time threshold, it indicates that the external fan is in a high-load operation state for a long time, which may pose risks such as system malfunction. Therefore, the speed of the external fan can be appropriately reduced.

[0101] In some implementations, the compressor's discharge pressure can be monitored in real time, and the monitored discharge pressure can be compared with a preset pressure threshold.

[0102] Optionally, the aforementioned preset pressure threshold can be set based on factors such as the air conditioner's cooling / heating capacity and system safety operation requirements.

[0103] For example, in cooling mode, the aforementioned pressure threshold can be set to 2.5~3.5MPa. When the discharge pressure is less than this pressure threshold, it indicates that the compressor's discharge pressure is within a safe and efficient range, thus allowing for an appropriate reduction in the outdoor fan speed.

[0104] S204. Adjust the speed of the external fan according to the exhaust pressure.

[0105] The compressor compresses the refrigerant and discharges it; the discharge pressure reflects the compressor's workload and the refrigerant's condensation in the condenser. The outdoor fan's function is to dissipate heat from the condenser and accelerate refrigerant condensation.

[0106] When the exhaust pressure changes, it means that the condenser's heat dissipation requirements have changed. By adjusting the speed of the outdoor fan, the airflow speed around the condenser can be altered, thereby regulating the heat dissipation effect, maintaining the exhaust pressure within a reasonable range, and ensuring the stable and efficient operation of the air conditioning system.

[0107] For example, when the activation of the rage mode is detected, or when a scenario that is prone to overload operation is identified, the outdoor fan can be controlled to start at the highest speed (e.g., 100% duty cycle) before or simultaneously with the compressor to start increasing the frequency. The outdoor fan runs at the highest speed for a period of time, or after the compressor's exhaust pressure is detected to reach a preset pressure threshold, the outdoor fan switches to closed-loop control based on the compressor's exhaust pressure.

[0108] The air conditioner outdoor fan control method provided in this embodiment of the invention can improve the condenser heat dissipation capacity in advance by controlling the outdoor fan to run at a first speed when the air conditioner meets the conditions for entering the first working mode. When the duration of the outdoor fan running at the first speed is greater than a preset duration threshold, or the exhaust pressure of the compressor is less than a preset pressure threshold, the method switches to closed-loop control based on exhaust pressure, thereby achieving a balance between rapid response, stable output and system safety.

[0109] 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.

[0110] In some embodiments, the above-mentioned air conditioner outdoor fan control method includes:

[0111] S301, Collect the first data.

[0112] Optionally, the first data includes at least one of the following:

[0113] (1) User operation data

[0114] In some implementations, user operation data can be generated based on user actions. For example, it can be generated based on user mode selection operations (high-power mode, energy-saving mode, silent mode, etc.), temperature setting operations, fan speed selection operations, and on / off operations.

[0115] (2) Air conditioning operation data

[0116] In some implementations, air conditioner operating data may include data collected during air conditioner operation, including but not limited to compressor operating frequency and frequency increase times.

[0117] (3) Ambient temperature data

[0118] In some implementations, the aforementioned ambient temperature data may include real-time outdoor temperature.

[0119] Optionally, a temperature sensor installed near the outdoor unit can be used to collect the aforementioned ambient temperature data.

[0120] S302. Based on the first data, determine whether the conditions for entering the first working mode are met. If yes, continue to execute S303; if no, return to execute S301.

[0121] In some implementations, the condition for entering the first operating mode is determined to be met when the first data satisfies at least one of the following:

[0122] (1) The user operation data includes the startup operation information of the first working mode.

[0123] For example, when a user actively triggers the first working mode via the air conditioner's remote control or a specific button on the control panel, the air conditioning system will receive the start-up operation information.

[0124] (2) The target frequency of the compressor is greater than the current operating frequency, and the difference between the target frequency and the current operating frequency is greater than the preset threshold.

[0125] The compressor's target frequency is the ideal operating frequency calculated by the air conditioner based on factors such as the current indoor and outdoor environmental conditions and the user's set temperature, while the current operating frequency is the frequency at which the compressor is actually running.

[0126] When the target frequency is greater than the current operating frequency and the difference between the two exceeds a preset threshold, it indicates that the air conditioning system needs to significantly improve its cooling / heating capacity.

[0127] For example, in the hot summer, when the indoor temperature suddenly rises, the air conditioning system calculates that the compressor frequency needs to be increased from 50Hz to 80Hz (assuming the preset threshold is 20Hz). At this time, it can be determined that the air conditioner meets the conditions to enter the first working mode.

[0128] (3) The amount of change in ambient temperature detected within the preset time period is greater than the preset change threshold.

[0129] Rapid changes in ambient temperature may affect indoor comfort, requiring the system to make corresponding adjustments.

[0130] Optionally, the preset duration can be set according to actual conditions, such as 5 minutes, 10 minutes, etc., and is not limited in this invention. The above-mentioned preset change threshold is the boundary value for judging whether the change in ambient temperature is significant.

[0131] Understandably, during normal air conditioning operation, the condenser is responsible for condensing the high-temperature, high-pressure refrigerant gas discharged from the compressor, turning it into a liquid state. During this process, the outdoor fan drives airflow, dissipating the heat from the condenser into the surrounding environment.

[0132] In normal operating mode, as the air conditioner runs for a while, the ambient temperature around the outdoor fan will tend to stabilize, without significant increases (cooling mode) or decreases (heating mode). For example, in cooling mode, the ambient temperature is 30°C when the unit is turned on, and after running for a period of time, the ambient temperature may stabilize at around 32°C, with a small increase.

[0133] When an air conditioner is operating under high load, the compressor needs to consume more energy in a short period of time to maintain the cooling cycle, and at the same time, it will generate more heat in a short period of time. This heat accumulates around the outdoor unit, which will cause the ambient temperature to rise significantly (cooling mode) or drop significantly (heating mode) in a short period of time (e.g., 3 minutes).

[0134] For example, in the same cooling mode, if the ambient temperature is 30°C when the air conditioner is turned on, after the air conditioner runs under high load for 3 minutes, the ambient temperature may rise to 38°C due to poor heat dissipation of the outdoor unit, which exceeds the temperature change range during normal heat dissipation.

[0135] In some implementations, at the moment the air conditioner is turned on, a temperature sensor installed near the outdoor unit of the air conditioner can be used to accurately measure the ambient temperature and record the ambient temperature data as a reference value.

[0136] During the set monitoring time, the ambient temperature is continuously measured using the aforementioned temperature sensor at set time intervals. Based on the collected ambient temperature data, it is calculated whether the change in ambient temperature within the preset time period is greater than the preset change threshold. If so, it indicates that the air conditioner is in a high-load operation state, meeting the conditions for entering the first working mode.

[0137] (4) The detected ambient temperature is greater than the preset temperature threshold.

[0138] When the ambient temperature exceeds the preset temperature threshold set by the system, it indicates that the current environmental conditions may have a significant impact on indoor comfort, and the first working mode needs to be activated to improve the situation.

[0139] For example, in summer, the preset temperature threshold is set to 38°C. When the detected outdoor ambient temperature is greater than 38°C, it can be determined that the current weather is extremely hot, and the air conditioner meets the conditions to enter the first working mode.

[0140] S303. Adjust the speed of the outdoor fan of the air conditioner to the first speed.

[0141] In some implementations, when it is determined that the air conditioner meets the conditions for entering the first working mode, the speed of the air conditioner's outdoor fan can be actively adjusted to the first speed in one go, thereby improving the heat dissipation capacity of the condenser in advance.

[0142] S304. Determine whether the duration of operation of the external fan at the first speed is greater than the preset duration threshold, or whether the exhaust pressure of the compressor is less than the preset pressure threshold; if yes, continue to execute S305; if no, return to execute S303.

[0143] In some implementations, the compressor's discharge pressure can be detected using a pre-installed pressure sensor.

[0144] Alternatively, the outlet pipe temperature of the air conditioner's condenser can be obtained, and the compressor's discharge pressure can be determined based on the outlet pipe temperature.

[0145] In an air conditioning system, refrigerant is compressed into a high-temperature, high-pressure gas in the compressor, and then enters the condenser for heat dissipation and condensation. The condensation process in the condenser is an isobaric process, meaning the pressure inside the condenser remains essentially constant and is equal to the compressor's discharge pressure. Furthermore, there is a specific correlation between the refrigerant's condensation temperature and pressure. Therefore, by measuring the temperature of the condenser outlet pipe, the compressor's discharge pressure can be indirectly determined based on this correlation between refrigerant temperature and pressure.

[0146] S305. Adjust the speed of the external fan according to the exhaust pressure.

[0147] In some implementations, the deviation between the exhaust pressure and a preset target pressure threshold can be calculated; based on this deviation, the speed of the external fan can be adjusted using a PID algorithm.

[0148] By calculating the deviation between the exhaust pressure and the preset target pressure threshold, and using a PID algorithm to adjust the speed of the external fan, precise control of the exhaust pressure can be achieved. The PID algorithm adjusts the control quantity based on the proportional, integral, and derivative components of the deviation, enabling it to respond quickly and accurately to system changes and stabilize the exhaust pressure near the target value.

[0149] Specifically, proportional (P) control adjusts the external fan speed based on the current deviation value e(t). The proportional coefficient Kp determines the sensitivity of the control variable to the deviation. A larger Kp allows the system to respond quickly to changes in deviation, but may lead to system overshoot or even oscillation; a smaller Kp will slow down the system response.

[0150] Integral (I) control is used to eliminate steady-state error in a system. The integral coefficient Ki determines the degree of influence of the integral action on the control quantity. The integral action can accumulate past deviation information, enabling the system to gradually adjust the control quantity and eliminate steady-state error when the deviation persists for a long time.

[0151] Derivative (D) control adjusts the control input based on the rate of change of the deviation. The derivative coefficient Kd determines the degree of influence of the derivative action on the control input. The derivative action can predict the trend of deviation change, make adjustments in advance, suppress system overshoot and oscillation, and improve the dynamic performance of the system.

[0152] The proportional, integral, and derivative control increments are added together to obtain the adjustment amount Δu(t) of the external fan speed. Then, based on the current external fan speed u(t) and the adjustment amount Δu(t), the new external fan speed u(t+1) = u(t) + Δu(t) is calculated.

[0153] In some implementations, the PID parameters of the PID algorithm can be selected according to the frequency range to which the compressor operates; different frequency ranges correspond to different PID parameters.

[0154] In some implementations, the entire frequency range can be divided into several sub-ranges based on the compressor's operating frequency characteristics. For example, for a common inverter air conditioner compressor, its frequency range can be divided into a low-frequency band (e.g., 20~40Hz), a medium-frequency band (e.g., 40~60Hz), and a high-frequency band (e.g., 60~80Hz).

[0155] Different frequency ranges correspond to different PID parameters, which can better adapt to the dynamic characteristics of the air conditioning system under different operating conditions, reduce overshoot and settling time, and improve the control accuracy of the air conditioning.

[0156] The air conditioner outdoor fan control method provided in this embodiment of the invention can identify potential user needs by analyzing user operation data, air conditioner operation data, ambient temperature data, etc., and dynamically adjust the outdoor fan speed to a first speed while or before increasing the air conditioner power. This adjustment can enable the condenser to have a higher heat dissipation capacity before increasing the air conditioner power, thereby avoiding compressor overload, excessively high exhaust temperature, and other situations caused by insufficient heat dissipation capacity.

[0157] In addition, the PID algorithm can adjust the speed of the outdoor fan in real time according to the deviation between the exhaust pressure and the target pressure, so that the exhaust pressure can be quickly and accurately stabilized near the target value, improving the control accuracy of the air conditioner and saving energy.

[0158] 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:

[0159] The determining module 401 is used to determine whether the conditions for entering the first working mode are met; the first working mode is the working mode in which the air conditioner compressor operates at a frequency greater than a first frequency threshold, and the first frequency threshold is the maximum frequency at which the compressor operates in other working modes besides the first working mode.

[0160] The control module 402 is used to adjust the speed of the outdoor fan of the air conditioner to a first speed when the conditions for entering the first working mode are met; the first speed is greater than the preset speed, and the preset speed is the maximum speed of the outdoor fan in other working modes besides the first working mode; when the outdoor fan runs at the first speed for a longer period than a preset time threshold, or the compressor exhaust pressure is less than a preset pressure threshold, the speed of the outdoor fan is adjusted according to the exhaust pressure.

[0161] In one possible implementation, the determining module 401 is specifically used for:

[0162] Collect first data, which includes at least one of the following: user operation data, air conditioning operation data, and ambient temperature data; based on the first data, determine whether the conditions for entering the first working mode are met.

[0163] In one possible implementation, the aforementioned air conditioning operating data includes the compressor's operating frequency; the determining module 401 is specifically used for:

[0164] The condition for entering the first working mode is determined to be met when the first data satisfies at least one of the following:

[0165] The user operation data includes the startup operation information for the first working mode;

[0166] The compressor's target frequency is greater than the current operating frequency, and the difference between the target frequency and the current operating frequency is greater than a preset threshold.

[0167] The detected change in ambient temperature within a preset time period is greater than a preset change threshold.

[0168] The detected ambient temperature is higher than the preset temperature threshold.

[0169] In one possible implementation, the control module 402 is specifically used for:

[0170] Calculate the deviation between the exhaust pressure and the preset target pressure threshold;

[0171] Based on the deviation value, the speed of the external fan is adjusted using a PID algorithm.

[0172] In one possible implementation, the control module 402 is further configured to:

[0173] The PID parameters of the PID algorithm are selected based on the frequency range to which the compressor operates; different frequency ranges correspond to different PID parameters.

[0174] In one possible implementation, the control module 402 is further configured to:

[0175] The compressor's discharge pressure is detected using a pre-set pressure sensor;

[0176] Alternatively, obtain the outlet pipe temperature of the air conditioner's condenser, and determine the compressor's discharge pressure based on the outlet pipe temperature.

[0177] 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.

[0178] Reference Figure 5 , Figure 5 This is a schematic diagram of the 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.

[0179] 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.

[0180] 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.

[0181] 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.

[0182] 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.

[0183] The memory may include random access memory (RAM) and may also include non-volatile memory (NVM), such as at least one disk storage device.

[0184] 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.

[0185] 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.

[0186] 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.

[0187] 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.

[0188] 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.

[0189] 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.

[0190] 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: Determine whether the conditions for entering the first working mode are met; the first working mode is the working mode in which the air conditioner compressor operates at a frequency greater than a first frequency threshold, the first frequency threshold being the maximum frequency at which the compressor operates in other working modes besides the first working mode; When the conditions for entering the first working mode are met, the speed of the outdoor fan of the air conditioner is adjusted to a first speed; the first speed is greater than a preset speed, and the preset speed is the maximum speed at which the outdoor fan operates in other working modes besides the first working mode; When the duration of operation of the external fan at the first speed exceeds a preset duration threshold, or when the exhaust pressure of the compressor is less than a preset pressure threshold, the speed of the external fan is adjusted according to the exhaust pressure.

2. The method according to claim 1, characterized in that, The determination of whether the conditions for entering the first working mode are met includes: Collect first data, which includes at least one of the following: user operation data, air conditioning operation data, and ambient temperature data; Based on the first data, determine whether the conditions for entering the first working mode are met.

3. The method according to claim 2, characterized in that, The air conditioner operating data includes the operating frequency of the compressor; The step of determining whether the conditions for entering the first working mode are met based on the first data includes: The condition for entering the first working mode is determined to be met when the first data satisfies at least one of the following: The user operation data includes the startup operation information of the first working mode; The target frequency of the compressor is greater than the current operating frequency, and the difference between the target frequency and the current operating frequency is greater than a preset threshold. The detected change in ambient temperature within a preset time period is greater than a preset change threshold. The detected ambient temperature is higher than the preset temperature threshold.

4. The method according to any one of claims 1 to 3, characterized in that, The step of adjusting the speed of the external fan according to the exhaust pressure includes: Calculate the deviation between the exhaust pressure and the preset target pressure threshold; Based on the deviation value, the rotational speed of the external fan is adjusted using a proportional-integral-derivative (PID) algorithm.

5. The method according to claim 4, characterized in that, The method further includes: The PID parameters of the PID algorithm are selected based on the frequency range to which the compressor's operating frequency belongs; different frequency ranges correspond to different PID parameters.

6. The method according to claim 4, characterized in that, The method further includes: The discharge pressure of the compressor is detected by a pre-set pressure sensor; Alternatively, the outlet pipe temperature of the air conditioner's condenser can be obtained, and the discharge pressure of the compressor can be determined based on the outlet pipe temperature.

7. An air conditioner outdoor fan control device, characterized in that, include: The determination module is used to determine whether the conditions for entering the first working mode are met; The first working mode is a working mode in which the air conditioner compressor operates at a frequency greater than a first frequency threshold, where the first frequency threshold is the maximum frequency at which the compressor operates in other working modes besides the first working mode. The control module is used to adjust the speed of the outdoor fan of the air conditioner to a first speed when the conditions for entering the first working mode are met; the first speed is greater than a preset speed, and the preset speed is the maximum speed at which the outdoor fan operates in other working modes besides the first working mode; When the duration of operation of the external fan at the first speed exceeds a preset duration threshold, or when the exhaust pressure of the compressor is less than a preset pressure threshold, the speed of the external fan is adjusted according to the exhaust pressure.

8. An air conditioning device, characterized in that, Including memory and 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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