Air conditioner, air conditioner control method, electronic equipment and program product

Abstract

The invention provides an air conditioner, an air conditioner control method, electronic equipment and a program product, and the air conditioner comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger, an outdoor fan, a temperature sensor, a current detection module and a controller; the controller is configured to control the temperature sensor to detect the coil temperature of the indoor heat exchanger and control the current detection module to detect the running current of the air conditioner; and under the condition that the air conditioner is in a refrigeration mode, the rotating speed of an outdoor fan is adjusted according to the coil pipe temperature of the indoor heat exchanger and the operation current of the air conditioner, and the operation frequency of a compressor is adjusted so as to control the coil pipe temperature and the air conditioner current. Under the low-temperature boundary working condition, the frosting phenomenon of the indoor heat exchanger can be effectively restrained while the air conditioner keeps running in a refrigeration mode; and the situation that the whole machine operation current is too large due to high-load operation of the compressor can be avoided, the air conditioner load is reduced, and therefore the stability and safety of whole machine operation of the air conditioner are ensured.

Description

Technical Field

[0001] This invention relates to the field of refrigeration equipment technology, and in particular to an air conditioner, an air conditioner control method, electronic equipment, and a program product. Background Technology

[0002] In existing air conditioners, the indoor heat exchanger acts as an evaporator during the cooling process. When the ambient humidity is high or the operating time is long, the evaporator coils are prone to frosting. Frosting on the coils can block the airflow channels of the heat exchanger, reducing heat exchange efficiency and decreasing the air conditioner's cooling performance. To maintain the cooling effect, the outdoor fan is usually stopped to raise the temperature and achieve defrosting when the coils are frosted. However, this solution can lead to excessive system load, affecting the stability and safety of the air conditioner. Summary of the Invention

[0003] This invention provides an air conditioner, an air conditioner control method, an electronic device, and a program product to solve the problem that excessive system load can easily occur during coil defrosting in the air conditioning cooling process, affecting the stability and safety of the air conditioner.

[0004] In a first aspect, embodiments of this application provide an air conditioner, comprising: Indoor heat exchangers are used for heat exchange with the indoor environment; A compressor is used to compress the gaseous refrigerant flowing out of the indoor heat exchanger. An outdoor heat exchanger is used to exchange heat between the refrigerant flowing out of the compressor and the outdoor environment. Outdoor fan is used to drive outdoor air to flow through an outdoor heat exchanger; The detection device includes a temperature sensor for detecting the coil temperature of the indoor heat exchanger and a current detection module for detecting the air conditioning current. The controller is connected to the compressor, indoor fan, outdoor fan, and detection device. The controller is configured as follows: The temperature sensor is controlled to detect the coil temperature of the indoor heat exchanger, and the current detection module is controlled to detect the operating current of the air conditioner. When the air conditioner is in cooling mode, the speed of the outdoor fan and the operating frequency of the compressor are adjusted according to the coil temperature of the indoor heat exchanger and the operating current of the air conditioner, so as to control the coil temperature and the air conditioner current.

[0005] In this embodiment, by detecting the coil temperature of the indoor heat exchanger and the operating current of the air conditioner, and adjusting the compressor operating frequency and outdoor fan speed based on the coil temperature and air conditioner current, it is beneficial to effectively suppress frost formation on the indoor heat exchanger while maintaining cooling mode operation under low-temperature boundary conditions. Simultaneously, adjusting the air conditioner based on the air conditioner current during this process can avoid excessive overall operating current caused by the compressor operating at high load due to the outdoor fan stopping, reducing the air conditioner load during defrosting control, thereby ensuring the stability and safety of the entire air conditioner operation.

[0006] In one embodiment, the air conditioner further includes an indoor fan for driving indoor air to flow through an indoor heat exchanger; The controller adjusts the outdoor fan speed and compressor operating frequency based on the indoor heat exchanger coil temperature and the air conditioner's operating current. It is configured to: adjust the indoor and outdoor fan speeds and compressor operating frequency according to the coil temperature and air conditioner operating current to regulate the coil temperature to the target temperature range and the air conditioner's operating current to a preset range. In this solution, by introducing indoor fan regulation into the air conditioning refrigeration control logic, not only can evaporator frosting be suppressed more efficiently, but the regulation pressure on the compressor and outdoor fan can also be shared by adjusting the indoor fan, thereby achieving multi-coupling control and improving the air conditioner's reliability and operating efficiency.

[0007] In one embodiment, the controller adjusts the speeds of the indoor and outdoor fans and the compressor's operating frequency based on the coil temperature and the air conditioner's operating current. It is configured to: when the coil temperature is below the minimum of the target temperature range, adjust the outdoor fan speed to a first speed range and the indoor fan speed to a second speed range; when the air conditioner's operating current is greater than or equal to the maximum of a preset current range, control the outdoor fan operation according to the first speed range, adjust the indoor fan speed to a third speed range, and reduce the compressor's operating frequency; the minimum of the second speed range is greater than the maximum of the first speed range; and the minimum of the third speed range is greater than the maximum of the second speed range. This scheme sets different fan speed ranges (first, second, and third), with each range progressively increasing, allowing the system to dynamically adjust the heat exchange intensity according to different operating conditions, avoiding drastic fluctuations in the fan and compressor speeds, and achieving more stable operation control. Furthermore, differentiated control is used under both low coil temperature and high current conditions, enabling the system to suppress energy consumption increases while maintaining indoor heat exchange capacity and ensuring uniform indoor air temperature distribution.

[0008] In one embodiment, the controller reduces the compressor's operating frequency by: reducing the compressor's operating frequency to a target frequency, which is the required compressor operating frequency range in cooling mode; after reducing to the target frequency, adjusting the compressor's operating frequency according to the air conditioner's operating current, so that the compressor's operating frequency changes linearly with the air conditioner's operating current, and remains within the required compressor operating frequency range for the cooling mode. In this solution, by adjusting the linear relationship between the operating current and the compressor frequency, the compressor operation is matched in real time to changes in system load. In the event of excessive operating current, the gradual adjustment and linear control of the compressor frequency avoids the impact of large fluctuations on the refrigerant circulation system. Furthermore, during the adjustment of the compressor frequency, the compressor frequency is always controlled within the required range for cooling mode, avoiding a decrease in user comfort due to excessively low frequency.

[0009] In one embodiment, after reducing the compressor's operating frequency, the controller is further configured to: adjust the outdoor and indoor fans to a second speed range and adjust the compressor's operating frequency to a preset frequency when the air conditioner's operating current is less than the maximum value of a preset current range and the coil temperature is greater than the maximum value of a target temperature range. By increasing the outdoor fan speed and decreasing the indoor fan speed to the second speed range, heat exchange efficiency is enhanced, preventing further increases in coil temperature. Simultaneously, by fixing the compressor's operating frequency, frequent frequency increases and decreases are reduced, ensuring system stability and energy efficiency.

[0010] In one embodiment, the controller adjusts the speed of the indoor and outdoor fans and the operating frequency of the compressor based on the coil temperature and the air conditioner's operating current. It is configured to: control the outdoor and indoor fans to operate within a second speed range and control the compressor to operate at a preset frequency when the coil temperature is greater than the minimum of the target temperature range but less than the preset temperature; and control the preset temperature to be greater than the minimum of the target temperature range but less than the maximum of the target temperature range. Reducing the outdoor fan speed to medium and increasing the indoor fan speed to medium can weaken heat exchange in the outdoor heat exchanger and enhance heat exchange in the indoor heat exchanger, thereby increasing the overall system pressure and temperature for defrosting. Simultaneously, maintaining the compressor at a stable preset frequency achieves a balanced output of cooling capacity.

[0011] In one embodiment, the controller adjusts the speeds of the indoor and outdoor fans and the compressor's operating frequency based on the coil temperature and the air conditioner's operating current. It is configured to: control the outdoor fan to operate within a third speed range and the indoor fan within a first speed range when the coil temperature is higher than a preset temperature; and control the compressor to operate at a preset frequency when the coil temperature is higher than a preset temperature. The minimum value of the third speed range is less than the maximum value of the first speed range; the preset temperature is greater than the minimum value of the target temperature range but less than the maximum value. This scheme enhances the heat dissipation capacity of the outdoor condenser and slows down the speed at which indoor air flows through the evaporator when the coil temperature is higher than the preset temperature, preventing excessive indoor airflow from causing a rapid drop in room temperature or a decrease in comfort, thus ensuring cooling performance. Simultaneously, it maintains a stable compressor operating frequency, ensuring the continuity and stability of the refrigeration cycle.

[0012] Secondly, this application provides an air conditioning control method for adjusting the coil temperature and air conditioning current of an air conditioner. The air conditioner includes an indoor heat exchanger, an outdoor heat exchanger, a compressor, an outdoor fan, and a detection device. The detection device includes a temperature sensor for detecting the coil temperature of the indoor heat exchanger and a current detection module for detecting the air conditioning current. The air conditioning control method includes: controlling a temperature sensor to detect the coil temperature of the indoor heat exchanger and controlling a current detection module to detect the operating current of the air conditioner; when the air conditioner is in cooling mode, adjusting the speed of the outdoor fan and the operating frequency of the compressor according to the coil temperature of the indoor heat exchanger and the operating current of the air conditioner, so as to regulate the coil temperature and the air conditioner current.

[0013] Thirdly, embodiments of this application provide an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the functions of the controller in the air conditioner or the steps of the air conditioner control method described above.

[0014] Fourthly, embodiments of this application provide a readable storage medium storing a computer program that, when executed by a processor, implements the functions of the controller in the air conditioner or the steps of the air conditioner control method described above.

[0015] Fifthly, embodiments of this application provide a computer program product, which includes a computer program. When the computer program is run, it enables the function of the controller in the air conditioner to be realized, or the air conditioner control method to be executed. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of an air conditioner structure according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of an air conditioner controller according to an embodiment of the present invention; Figure 3 This is a schematic flowchart of an air conditioning control method according to an embodiment of the present invention; Figure 4 This is another schematic flowchart of the air conditioning control method in one embodiment of the present invention; Figure 5 yes Figure 4 A schematic diagram of the implementation process of step S21; Figure 6 yes Figure 4 Another implementation flow diagram of step S21; Figure 7 yes Figure 4 Another implementation flowchart of step S21; Figure 8 This is another schematic flowchart of the air conditioning control method in one embodiment of the present invention; Figure 9 This is a schematic diagram of the structure of an electronic device according to an embodiment of the present invention.

[0018] The descriptions of the accompanying figures are as follows: 2-Air guide plate; 11-Indoor unit; 12-Air outlet; 13-Return air outlet; 14-Outdoor unit; 200-Control device; 71-Controller; 83-Processor; 82-Memory; 81-Communication interface; 81-Bus. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] It should be understood that, when used in this specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or collections thereof. It should also be understood that, as used in this specification and the appended claims, the term "and / or" refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0021] Furthermore, in the description of this invention and the appended claims, the terms "first," "third," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0022] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of the invention include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0023] It should be understood that the sequence number of each step in the following embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0024] To illustrate the technical solution of the present invention, specific embodiments are described below.

[0025] This application provides an air conditioner, referring to... Figure 1 The air conditioner includes a refrigeration system for exchanging heat with indoor air to meet cooling or heating needs.

[0026] The refrigeration system includes a compressor 1, a condenser, an expansion valve, and an evaporator. In this application, the air conditioner performs a refrigeration cycle by using the compressor, condenser, expansion valve, and evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the conditioned and heat-exchanged air.

[0027] The compressor compresses refrigerant gas under high temperature and pressure and discharges the compressed refrigerant gas; the discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

[0028] The expansion valve causes the high-temperature, high-pressure liquid refrigerant condensed in the condenser to expand into a low-pressure liquid refrigerant. The evaporator evaporates the refrigerant that has expanded in the expansion valve and returns the low-temperature, low-pressure refrigerant gas to the compressor.

[0029] An evaporator achieves a cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled. Throughout the cycle, the air conditioner regulates the temperature of the indoor space.

[0030] The outdoor unit of an air conditioner refers to the part of the refrigeration cycle that includes the compressor and the outdoor heat exchanger. The indoor unit of an air conditioner includes the indoor heat exchanger, and an expansion valve can be provided in either the indoor or outdoor unit. The indoor and outdoor heat exchangers function as either condensers or evaporators. When the indoor heat exchanger is used as a condenser, the air conditioner acts as a heater in heating mode; when the indoor heat exchanger is used as an evaporator, the air conditioner acts as a cooler in cooling mode.

[0031] The air conditioner in this embodiment includes an indoor unit 11 and an outdoor unit 14, which can be configured as an integrated unit or a split unit. The indoor unit 11 can be configured as a wall-mounted unit, a ceiling-mounted unit, a ducted unit, etc., and the indoor unit 11 is installed on the top of the room.

[0032] Taking an indoor wall-mounted air conditioner as an example, refer to Figure 1 Indoor wall-mounted units are typically installed on indoor walls or similar locations. Similarly, floor-standing indoor units (not shown in the diagram) are also a type of indoor unit 11. Taking split-type air conditioners as an example, an air conditioner includes an indoor unit 11 and an outdoor unit 14. The outdoor unit 14 is typically located outdoors and is used for heat exchange between the indoor and outdoor environments.

[0033] In this embodiment, the indoor unit 11 of the air conditioner is installed at the top or upper part of the room. Generally, the installation height of the indoor unit 11 is higher than the user's activity area. The indoor unit 11 includes a return air vent 13 and an air outlet 12 that communicate with the room. Indoor air passes through the return air vent 13 into the indoor unit 11 and flows back into the room through the air outlet 12. The air outlet and return air vent are also located above the user's activity area.

[0034] The refrigerant circulation loop in this application allows the refrigerant to circulate within a circuit consisting of a compressor, condenser, expansion valve, and evaporator. One of the condensers and the other the evaporator is an outdoor heat exchanger, and the other is an indoor heat exchanger. The indoor heat exchanger is used to exchange heat with the air inside the indoor unit 11, and the outdoor heat exchanger is used to exchange heat with the air inside the outdoor unit 14, thereby fulfilling the cooling or heating needs of the air conditioner.

[0035] The indoor unit 11 also includes an indoor fan, which is located near the return air vent 13 or the air outlet 12 of the indoor heat exchanger. The indoor fan drives indoor air through the heat exchanger and delivers the heat-exchanged air into the room. The indoor fan has multiple speed settings to change the airflow velocity at the air outlet 12. An air guide plate 2 is located at the air outlet 12. By changing its relative rotation angle with the air outlet 12, the air guide plate 2 adjusts the airflow direction through the air outlet 12, thereby affecting the stratification of indoor air temperature.

[0036] The outdoor unit 14 also includes an outdoor fan, which is located near the return air vent or the air outlet of the outdoor heat exchanger. The outdoor fan drives outdoor air to flow through the outdoor heat exchanger and delivers the heat-exchanged air to the outdoor environment. The outdoor fan may also include multiple speed settings to change the airflow velocity at the outlet of the outdoor heat exchanger.

[0037] In the embodiments shown in this application, the air conditioner also includes a controller 71 to control the operation of various components within the air conditioner, enabling each component to perform its predetermined functions. The air conditioner also includes a control device; exemplarily, this control device is a remote control 200, which has the function of communicating with the controller 71, for example, using infrared or other communication methods. The remote control allows the user to perform various controls on the air conditioner, enabling interaction between the user and the air conditioner.

[0038] This application embodiment also provides a hardware structure diagram of the controller 71, such as... Figure 2 As shown, the controller 71 includes a processor 83, and optionally, a memory 82 and a communication interface 84 connected to the processor 83. The processor 83, memory 82, and communication interface 84 are connected via a bus 81.

[0039] Processor 83 can be a central processing unit (CPU), a general-purpose processor (NP), a network processor (NP), a digital signal processor (DSP), a microprocessor (Microcontroller 71), a programmable logic device (PLD), or any combination thereof. Processor 83 can also be any other device with processing capabilities, such as a circuit, device, or software module. Processor 83 can also include multiple CPUs, and processor 83 can be a single-core (single-CPU) processor 83 or a multi-core (multi-CPU) processor 83. Here, processor 83 can refer to one or more devices, circuits, or processing cores used for processing data (e.g., computer program instructions).

[0040] The memory 82 can be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, a random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer. This application embodiment does not impose any limitations on this. The memory 82 can exist independently or be integrated with the processor 83. The memory 82 may contain computer program code. The processor 83 is used to execute the computer program code stored in the memory 82, thereby implementing the control method of the multi-split air conditioning system 100100 provided in this application embodiment.

[0041] The communication interface 84 can be used to communicate with other devices or communication networks (such as Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc.). The communication interface 84 can be a module, circuit, transceiver, or any device capable of communication.

[0042] Bus 81 can be a Peripheral Component Interconnect (PCI) bus 81 or an Extended Industry Standard Architecture (EISA) bus 81, etc. Bus 81 can be divided into address bus 81, data bus 81, control bus 81, etc. For ease of representation, Figure 2 The bus is represented by only one thick line, but this does not mean that there is only one bus 81 or one type of bus 81.

[0043] In some embodiments of this example, the air conditioner further includes a detection device, which includes a temperature sensor for detecting the coil temperature of the indoor heat exchanger and a current detection module for detecting the air conditioner current. The temperature sensor is mounted on the indoor heat exchanger. Specifically, the temperature sensor can be installed on the side of the indoor heat exchanger near the air outlet to detect the coil temperature. The temperature sensor is electrically connected to the controller 71, detecting the coil temperature and sending it to the controller 71. The current detection module is mounted on the air conditioner power cord to detect the overall current of the air conditioner.

[0044] It's important to understand that during the cooling process, the indoor heat exchanger acts as an evaporator in an air conditioner. When the ambient humidity is high or the operating time is long, the evaporator coils are prone to frosting. Frosting on the coils can block the airflow channels of the heat exchanger, reducing heat exchange efficiency and decreasing the air conditioner's cooling performance. To maintain cooling efficiency, when the coils are frosted, the outdoor fan is usually stopped, preventing the condenser from exchanging heat and thus raising the coil temperature to defrost. However, in this approach, because the compressor is running while the outdoor fan is not, the condenser is not exchanging heat, causing the air conditioning system load to spike. This can lead to a surge in the overall current of the air conditioner, exceeding the power cord's limits and affecting the stability and safety of the air conditioner.

[0045] Furthermore, to avoid the system load spike caused by stopping the outdoor fan for defrosting, some solutions stop cooling by shutting down the compressor when the coil temperature reaches the corresponding frosting threshold, thus achieving rapid defrosting. The compressor is then restarted for cooling once the coil temperature rises to a certain threshold, indicating defrosting is complete. However, this control scheme results in frequent compressor start-stop cycles, causing the air conditioner to cool intermittently, severely impacting the user experience. Frequent compressor start-stop cycles in a short period can also damage the compressor's structure and shorten its lifespan.

[0046] To address the aforementioned issues, this application provides an air conditioner, an air conditioner control method, an electronic device, and a program product to solve the problem of excessive system load during coil defrosting in the air conditioning cooling process, which affects the stability and safety of the air conditioner. It also solves the problem of frequent compressor start-stop during defrosting control, which affects user experience and compressor lifespan.

[0047] The air conditioner provided in this embodiment includes a compressor, an indoor heat exchanger for heat exchange with the indoor environment, an outdoor heat exchanger for heat exchange between the refrigerant flowing from the compressor and the outdoor environment, a temperature sensor, a current detection module, and a controller. The controller is connected to the compressor, indoor fan, outdoor fan, and detection device. The controller is configured to: during air conditioner operation, control the temperature sensor to detect the coil temperature of the indoor heat exchanger and control the current detection module to detect the operating current of the air conditioner; when the air conditioner is in cooling mode, adjust the speed of the outdoor fan and the operating frequency of the compressor based on the coil temperature of the indoor heat exchanger and the operating current of the air conditioner to control the coil temperature and the air conditioner current. This solution is beneficial for effectively suppressing frost formation on the indoor heat exchanger while maintaining cooling mode operation under low-temperature boundary conditions. Simultaneously, adjusting the air conditioner based on the air conditioner current during this process avoids excessive overall operating current caused by the compressor operating at high load due to the outdoor fan stopping, reducing the air conditioner load during defrosting control, thereby ensuring the stability and safety of the entire air conditioner operation. In addition, defrosting does not require controlling the compressor to stop, which avoids frequent start-stop of the compressor during the defrosting process, ensuring the air conditioner can operate continuously, improving the user experience, and reducing compressor structural damage caused by frequent start-stop, thus ensuring the compressor's lifespan.

[0048] To facilitate a further understanding of the technical solutions in some embodiments of this application, the technical solutions of air conditioners and air conditioning control methods, and how these solutions solve the aforementioned technical problems, are described in detail below with reference to specific embodiments and accompanying drawings. The embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application.

[0049] The air conditioning control method provided in this embodiment of the invention can be applied to, for example... Figure 1 The air conditioner shown includes a compressor, an indoor heat exchanger, an outdoor heat exchanger, an outdoor fan, an indoor fan, a detection device, and a controller. The detection device includes a temperature sensor and a current detection module.

[0050] The system comprises: an indoor heat exchanger for heat exchange with the indoor environment; a compressor for compressing the gaseous refrigerant flowing from the indoor heat exchanger; an outdoor heat exchanger for heat exchange between the refrigerant flowing from the compressor and the outdoor environment; and an outdoor fan for driving outdoor air through the outdoor heat exchanger. A temperature sensor detects the coil temperature of the indoor heat exchanger, and a current detection module detects the current of the entire air conditioning unit.

[0051] The controller is connected to the compressor, indoor fan, outdoor fan, and detection device. The controller is configured to: control the temperature sensor to detect the coil temperature of the indoor heat exchanger and control the current detection module to detect the operating current of the air conditioner during the operation of the air conditioner; and adjust the speed of the outdoor fan and the operating frequency of the compressor according to the coil temperature of the indoor heat exchanger and the operating current of the air conditioner when the air conditioner is in cooling mode, so as to control the coil temperature and the air conditioner current.

[0052] In this embodiment, by detecting the coil temperature of the indoor heat exchanger and the operating current of the air conditioner, and adjusting the compressor operating frequency and outdoor fan speed based on the coil temperature and air conditioner current, it is beneficial to effectively suppress frost formation on the indoor heat exchanger while maintaining cooling mode operation under low-temperature boundary conditions. Simultaneously, adjusting the air conditioner based on the air conditioner current during this process avoids excessive overall operating current caused by high compressor load due to outdoor fan shutdown, reducing the air conditioner load during defrosting control and thus ensuring the stability and safety of the entire air conditioner operation. Furthermore, defrosting does not require stopping the compressor, avoiding frequent compressor start-stop during defrosting control, ensuring continuous air conditioning operation, improving user experience, and reducing compressor structural damage caused by frequent start-stop, thus extending compressor lifespan.

[0053] In one embodiment, such as Figure 3 As shown, an air conditioning control method is provided, which is applied to... Figure 1 Taking the controller of a central air conditioner as an example, the controller is configured to perform the following steps: S10: Control the temperature sensor to detect the coil temperature of the indoor heat exchanger, and control the current detection module to detect the operating current of the air conditioner.

[0054] During the operation of the air conditioner, the controller controls the temperature sensor to detect the coil temperature of the indoor heat exchanger and controls the current detection module to detect the operating current of the air conditioner.

[0055] After the air conditioner starts operating, the controller sends a data acquisition command to the temperature sensor installed near the air outlet or coil of the indoor heat exchanger. Upon receiving the command, the temperature sensor monitors the coil temperature of the indoor heat exchanger in real time, converts the acquired temperature signal into an electrical signal, and outputs it to the controller as coil temperature data, thus obtaining the coil temperature of the indoor heat exchanger. Simultaneously, the controller sends a detection command to the current detection module. Upon receiving the command, the current detection module collects the operating current of the air conditioner in real time, converts the acquired current signal into a standard voltage or digital signal, and feeds it back to the controller as the operating current data of the air conditioner, thus obtaining the operating current of the air conditioner.

[0056] In one embodiment, to ensure the accuracy of the coil temperature and the air conditioner's operating current, after receiving the coil temperature data sent by the temperature sensor and the operating current data sent by the current detection module, the controller can filter, remove outliers, and average the coil temperature data and operating current data from multiple consecutive moments, so as to use the processed data as the coil temperature and air conditioner's operating current at the current moment, thereby ensuring the accuracy of subsequent control.

[0057] S20: When the air conditioner is in cooling mode, the speed of the outdoor fan and the operating frequency of the compressor are adjusted according to the coil temperature of the indoor heat exchanger and the operating current of the air conditioner, so as to control the coil temperature and the air conditioner current.

[0058] During air conditioner operation, the controller can also determine the air conditioner's operating mode, which includes cooling mode and heating mode. Different operating modes correspond to different mode identification signals, and the controller can determine the air conditioner's operating mode based on the mode identification signal of the current operating mode. When the air conditioner is determined to be in cooling mode, that is, under low-temperature conditions, the indoor heat exchanger coil may experience frost formation. In cooling mode, to avoid or reduce the risk of coil frost formation, the controller can adjust the outdoor fan speed and the compressor operating frequency based on the indoor heat exchanger coil temperature and the air conditioner's operating current to control the coil temperature and air conditioner current.

[0059] The controller compares the coil temperature with a pre-calibrated frosting threshold temperature. When the coil temperature approaches or falls below this threshold, it indicates a risk of frosting. In this case, the outdoor fan speed can be reduced to slow refrigerant condensation, increase coil temperature, and thus suppress frosting on the indoor heat exchanger coil. During this process, because the outdoor fan operates at low speed, the condenser's (outdoor heat exchanger) heat exchange efficiency decreases, causing a rapid increase in air conditioning system load and temperature, potentially leading to a rise in overall air conditioning unit current. Therefore, the compressor's operating frequency can be adjusted to reduce system load and thus lower overall air conditioning unit current.

[0060] In other words, during the process of reducing the outdoor fan speed, if the difference between the overall air conditioner operating current and the rated safe current is less than the current threshold, or if the current change rate is greater than the preset change rate, the compressor operating frequency can be adjusted. For example, the compressor operating frequency can be reduced to decrease the system load, thereby reducing the overall air conditioner current and mitigating the risk of excessive current due to excessive system load, ensuring the stability and safety of air conditioner operation. Simultaneously, the outdoor fan speed can be increased to enhance heat dissipation, further reducing the system load and thus lowering system pressure and current. Subsequently, when the coil temperature is detected to rise and the current returns to the preset current range, the controller gradually increases the compressor operating frequency to maintain the cooling capacity required for air conditioner operation.

[0061] In other embodiments, the controller can also use PID algorithm or fuzzy logic control based on the combined data of coil temperature and air conditioner operating current to achieve dynamic linkage adjustment of outdoor fan speed and compressor frequency, ensuring that evaporator temperature and system current are maintained within a safe and stable range.

[0062] In this embodiment, by detecting the coil temperature of the indoor heat exchanger and the operating current of the air conditioner, and adjusting the compressor operating frequency and outdoor fan speed based on the coil temperature and air conditioner current, it is beneficial to effectively suppress frost formation on the indoor heat exchanger while maintaining cooling mode operation under low-temperature boundary conditions. Simultaneously, adjusting the air conditioner based on the air conditioner current during this process avoids excessive overall operating current caused by high compressor load due to outdoor fan shutdown, reducing the air conditioner load during defrosting control and thus ensuring the stability and safety of the entire air conditioner operation. Furthermore, defrosting does not require stopping the compressor, avoiding frequent compressor start-stop during defrosting control, ensuring continuous air conditioning operation, improving user experience, and reducing compressor structural damage caused by frequent start-stop, thus extending compressor lifespan.

[0063] In one embodiment, the air conditioner further includes an indoor fan for driving indoor air through an indoor heat exchanger. Figure 4As shown, when the air conditioner is in cooling mode, the controller adjusts the speed of the outdoor fan and the operating frequency of the compressor based on the coil temperature of the indoor heat exchanger and the operating current of the air conditioner. The controller is configured as follows: S21: When the air conditioner is in cooling mode, the speed of the indoor fan and the outdoor fan are adjusted according to the coil temperature and the operating current of the air conditioner, and the operating frequency of the compressor is adjusted to adjust the coil temperature to the target temperature range and the operating current of the air conditioner to the preset current range.

[0064] When the air conditioner is in cooling mode, the controller can adjust the speed of the indoor and outdoor fans and the operating frequency of the compressor according to the coil temperature and the air conditioner's operating current, so as to adjust the coil temperature to the target temperature range and the air conditioner's operating current to the preset current range.

[0065] The target temperature range is calibrated based on measured data from the indoor heat exchanger, ensuring that the coils will not frost over. This target temperature range can be (-7℃, 5℃). The preset current range is a pre-calibrated safe current range. This preset current range can be less than the rated current of the air conditioner power cord. Alternatively, it can be less than the calibrated current, which can be the product of the rated current of the air conditioner power cord and 90%, i.e., 90% of the rated current of the air conditioner power cord.

[0066] In the cooling mode, the controller compares the coil temperature with a pre-calibrated frosting threshold temperature. If the coil temperature is close to or below this threshold, it indicates a risk of frosting. At this point, the outdoor fan speed can be reduced to slow refrigerant condensation, thus preventing excessive refrigerant cooling and frosting of the indoor heat exchanger coils. Simultaneously, the indoor fan speed can be increased to enhance airflow to the heat exchanger, accelerating heat exchange and preventing further frosting on the coil surface. During this process, because the outdoor fan operates at low speed, the condenser's (outdoor heat exchanger) heat exchange efficiency decreases, causing a rapid increase in the air conditioning system load and temperature, potentially leading to a higher overall current. Therefore, the compressor's operating frequency can be adjusted to reduce the system load and thus lower the overall current.

[0067] In other words, during the process of reducing the outdoor fan speed, if the difference between the overall air conditioner operating current and the rated safe current is less than the current threshold, or if the current change rate is greater than the preset change rate, the compressor operating frequency can be adjusted. For example, the compressor operating frequency can be reduced to decrease the system load, thereby reducing the overall air conditioner current and mitigating the risk of excessive current due to excessive system load, ensuring the stability and safety of air conditioner operation. Simultaneously, the indoor fan speed can be reduced to decrease air load and system energy consumption; conversely, the outdoor fan speed can be increased to accelerate system heat dissipation, reduce the compressor load, and decrease the system load, thereby reducing the air conditioner's operating current. Subsequently, when the coil temperature is detected to rise and the current returns to the preset current range, the controller gradually increases the compressor operating frequency to maintain the cooling capacity required for air conditioner operation.

[0068] In this embodiment, when the air conditioner is in cooling mode, the controller can adjust the speed of the indoor and outdoor fans and the operating frequency of the compressor based on the coil temperature and the air conditioner's operating current. This is done to adjust the coil temperature to the target temperature range and the air conditioner's operating current to a preset range. By introducing the adjustment of the indoor fan into the air conditioner's cooling control logic, not only can evaporator frosting be suppressed more efficiently, but the adjustment of the indoor fan can also share the adjustment pressure of the compressor and the outdoor fan. This achieves multi-coupling control → faster dynamic response → lower energy consumption and current fluctuations, thus improving the overall reliability and operating efficiency of the air conditioner.

[0069] In one embodiment, such as Figure 5 As shown, in step S21, the controller adjusts the speed of the indoor and outdoor fans and the operating frequency of the compressor based on the coil temperature and the air conditioner's operating current, and is configured to execute the following steps: S211: When the coil temperature is less than the minimum of the target temperature range, adjust the speed of the outdoor fan to the first speed range and the speed of the indoor fan to the second speed range.

[0070] In this range, the minimum value of the second speed range is greater than the maximum value of the first speed range, and the minimum value of the third speed range is greater than the maximum value of the second speed range. For example, the first speed range could be (800 r / min, 900 r / min). The second speed range could be (1000 r / min, 1100 r / min) or (1000 r / min, 1250 r / min). The third speed range could be (1300 r / min, 1400 r / min). When the air conditioner is in cooling mode, the controller can detect whether the coil temperature of the indoor heat exchanger is less than or equal to the minimum value of the target temperature range (e.g., -7°C). If the coil temperature is less than the minimum value of the target temperature range, it indicates that there is a risk of frosting on the indoor heat exchanger (i.e., evaporator) coil. In this case, the outdoor fan speed can be adjusted to the first speed range, i.e., a lower speed range, to reduce outdoor heat exchange and decrease condensation, thereby increasing the refrigerant evaporation temperature. Simultaneously, the indoor fan speed is also adjusted to the second speed range to increase indoor airflow. This reduces outdoor heat exchange intensity while enhancing indoor airflow to remove cooling capacity, achieving a dynamic balance between indoor and outdoor heat exchange. This increases the overall system pressure and temperature, preventing the system from becoming too cold or experiencing reduced energy efficiency, and gradually raises the coil temperature back to the target temperature range for evaporator defrosting.

[0071] During this process, the compressor's operating frequency can be left unchanged, maintaining it within the range required for cooling mode; alternatively, the compressor's operating frequency can be controlled to a preset frequency, which is within the compressor's operating frequency range and is the default compressor operating frequency under the cooling model. This preset frequency can be calibrated based on actual compressor measurement data, and is the compressor frequency at which the indoor heat exchanger coil will not frost and the compressor load is minimized in cooling mode.

[0072] S212: When the operating current of the air conditioner is greater than or equal to the maximum value of the preset current range, the outdoor fan is controlled to operate within the first speed range, the speed of the indoor fan is adjusted to the third speed range, and the operating frequency of the compressor is reduced.

[0073] After adjusting the outdoor fan speed to the first speed range and the indoor fan speed to the second speed range, the air conditioner's operating current may increase due to overall system pressure and temperature. During this process, continuous monitoring of the air conditioner's operating current is necessary. If the detected operating current is greater than or equal to the maximum value of the preset current range (e.g., 90% of the air conditioner's power cord rated current), it indicates that the air conditioning system current is too high, posing a potential overcurrent risk. In this case, the controller can maintain the outdoor fan's operation within the first speed range to ensure stable system heat dissipation. Simultaneously, the indoor fan speed is increased and adjusted to the third speed range to significantly increase indoor airflow, accelerate indoor heat exchange, reduce the compressor's load, and thus reduce the suction load, thereby lowering the air conditioner's operating current.

[0074] Furthermore, when the air conditioner's operating current is greater than or equal to the maximum value of the preset current range, the compressor's operating frequency can be reduced. This directly reduces the compressor's input power and refrigerant circulation intensity, thereby lowering the overall current and preventing overcurrent. For example, the compressor's operating frequency can be reduced from the default preset frequency in cooling mode to a target frequency. This target frequency is lower than the preset frequency and falls within the compressor operating frequency range required by cooling mode.

[0075] In this embodiment, when the coil temperature is lower than the minimum target temperature range, reducing the outdoor fan speed to the first range and increasing the indoor fan speed to the second range weakens the refrigerant's heat dissipation on the outdoor side while enhancing the indoor airflow's ability to remove cooling capacity. This effectively prevents the coil temperature from continuing to drop and reduces the risk of evaporator frosting. When the air conditioner's operating current is detected to be greater than or equal to the maximum value of the preset current range, maintaining the outdoor fan speed in the first range, increasing the indoor fan speed to the third range, and reducing the compressor's operating frequency reduces the compressor load and the system's total current. This avoids overcurrent protection activation or power line overload due to excessive current, improving system operational safety. This solution sets first, second, and third different fan speed ranges, with each range progressively increasing. This allows the system to dynamically adjust the heat exchange intensity according to different operating conditions, avoiding drastic fluctuations in fan and compressor speeds and achieving more stable operation control. Furthermore, differentiated control is used under both low coil temperature and high current conditions, enabling the system to suppress energy consumption increases while maintaining indoor heat exchange capacity, ensuring uniform indoor air temperature distribution, and improving user comfort. In addition, by making targeted adjustments under low temperature and high current conditions, the frequency of abnormal operating conditions such as evaporator frosting and compressor overload is reduced, thereby reducing the wear and tear on key components and extending the service life of the air conditioner.

[0076] In one embodiment, in step S212, where the controller reduces the operating frequency of the compressor, it is configured to perform the following steps: S2121: Reduce the compressor's operating frequency to the target frequency, which is the range of compressor operating frequencies required in cooling mode.

[0077] If the air conditioner's operating current is greater than or equal to the maximum value of the preset current range, indicating a risk of overcurrent for the entire unit, the outdoor fan can be controlled within the first speed range, while the indoor fan's speed is adjusted to the third speed range. Simultaneously, the controller can gradually reduce the compressor's operating frequency from its current frequency (e.g., the preset frequency) according to a preset decreasing step size or rate, avoiding system pressure fluctuations caused by sudden, large drops, to reduce the compressor's operating frequency to the target frequency. The target frequency is within the required operating frequency range for cooling mode (e.g., 30Hz–60Hz) to ensure that basic cooling capacity is maintained while reducing the compressor load.

[0078] In addition, during the process of reducing the operating frequency of the compressor, the controller can also monitor the changes in coil temperature and air conditioner operating current in real time. Based on the coil temperature and air conditioner operating current, the controller can adjust the operating frequency of the indoor and outdoor fans and the compressor in a timely manner to ensure that the air conditioner operating current is within the preset current range and the coil temperature is within the target temperature range. This ensures that no new current fluctuations or abnormal coil temperatures will occur during the transition of the compressor operating frequency to the target frequency.

[0079] S2122: After reducing to the target frequency, the compressor's operating frequency is adjusted according to the air conditioner's operating current, so that the compressor's operating frequency changes linearly with the air conditioner's operating current, and is within the compressor operating frequency range required in cooling mode.

[0080] After reducing the compressor's operating frequency to the target frequency, the compressor's operating frequency can be dynamically adjusted based on the real-time operating current of the air conditioner, so that the compressor's operating frequency changes linearly with the air conditioner's operating current, and is within the required compressor operating frequency range in cooling mode.

[0081] For example, the real-time operating current of the air conditioner can be monitored. Based on the real-time operating current, the target adjustment frequency of the compressor can be calculated using a pre-stored frequency model. When the target adjustment frequency is within the compressor operating frequency range required in cooling mode, this adjustment frequency can be used as the control target for the compressor frequency, and the compressor operating frequency can be dynamically adjusted so that the compressor operating frequency changes linearly with the air conditioner's operating current.

[0082] The target adjustment frequency of the compressor can be calculated using the following frequency model: ; in, Indicates the target adjustment frequency of the compressor; This indicates the real-time operating current of the air conditioner; This represents the rate of change of the compressor's operating frequency; It can also be a pre-calibrated rate of change coefficient, which is a constant value.

[0083] If the target adjustment frequency is not within the compressor operating frequency range required in cooling mode, the minimum or maximum value of the compressor operating frequency range required in cooling mode can be used as the control target for the compressor frequency. The compressor operating frequency can be dynamically adjusted so that the compressor operating frequency range required in cooling mode is such that insufficient cooling is not caused by too low a frequency, nor is overcurrent risk caused by too high a frequency.

[0084] For example, the minimum and maximum values ​​of the compressor operating frequency range required in this cooling mode can be defined as the first limit and the second limit, respectively. If the target adjustment frequency is not within the required compressor operating frequency range in the cooling mode, the current operating frequency of the compressor can be determined, and the differences between these values ​​and the first and second limits can be used to obtain the first difference and the second difference. If the first difference is less than or equal to the second difference, meaning the current operating frequency of the compressor is closer to the minimum value of the required compressor operating frequency range in the cooling mode, then the minimum value of the required compressor operating frequency range in the cooling mode is used as the control target for the compressor frequency, and the compressor operating frequency is adjusted accordingly. If the first difference is greater than the second difference, meaning the current operating frequency of the compressor is closer to the maximum value of the required compressor operating frequency range in the cooling mode, then the maximum value of the required compressor operating frequency range in the cooling mode is used as the control target for the compressor frequency, and the compressor operating frequency is adjusted accordingly.

[0085] In other embodiments, the compressor's operating frequency can be gradually reduced from the current frequency according to a preset decreasing step size or rate, and timed. After the preset time has elapsed, that is, after the operating frequency has decreased for the preset time, the compressor's operating frequency is adjusted according to the air conditioner's operating current, so that the compressor's operating frequency changes linearly with the air conditioner's operating current and is within the compressor operating frequency range required in the cooling mode.

[0086] In this embodiment, when the air conditioner's operating current is greater than or equal to the maximum value of the preset current range, the outdoor fan is controlled to operate within the first speed range, while the indoor fan's speed is adjusted to the third speed range. Simultaneously, the compressor's operating frequency is reduced to the target frequency to rapidly decrease power consumption, prevent further increases in overall current, and avoid overloading of the power line or system components. After reducing to the target frequency, the compressor's operating frequency is adjusted according to the air conditioner's operating current, ensuring that the compressor's operating frequency changes linearly with the air conditioner's operating current and remains within the required compressor operating frequency range for the cooling mode. This linear relationship between operating current and compressor frequency allows the compressor's operation to match system load changes in real time, thereby avoiding frequent compressor starts and stops and improving operational stability. In cases of excessive operating current, the gradual adjustment and linear control of the compressor frequency prevents large fluctuations from impacting the refrigerant circulation system, reducing stress on the compressor and electrical components, and extending the service life of the air conditioning system. Furthermore, during compressor frequency adjustment, the compressor frequency is always controlled within the required range for the cooling mode, maintaining necessary cooling capacity while protecting against overcurrent, and avoiding a decrease in user comfort due to excessively low frequency.

[0087] In one embodiment, such as Figure 6 As shown, after step S212, that is, after the controller reduces the operating frequency of the compressor, it is also configured to perform the following steps: S213: When the operating current of the air conditioner is less than the maximum value of the preset current range and the coil temperature is greater than the maximum value of the target temperature range, adjust the outdoor fan and indoor fan to the second speed range and adjust the operating frequency of the compressor to the preset frequency.

[0088] The controller controls the outdoor fan to operate within the first speed range, adjusts the indoor fan speed to the third speed range, and reduces the compressor's operating frequency. The controller then collects the air conditioner's operating current in real time and compares it with the preset current range.

[0089] If the air conditioner's operating current is less than the maximum value of the preset current range, and the coil temperature is greater than the maximum value of the target temperature range (e.g., the operating current is less than 90% of the rated current of the air conditioner's power cord, and the coil temperature is greater than 5°C), it indicates that the air conditioner's current load is relatively low and the refrigerant temperature is too high, requiring enhanced heat dissipation. Energy consumption can be moderately increased to improve heat exchange capacity. If the indoor heat exchanger is not sufficiently exchanging heat, the cooling effect needs to be enhanced. In this case, the outdoor and indoor fans can be controlled according to the second speed range. That is, the outdoor fan speed is increased from the first speed range to the second speed range to enhance condenser heat dissipation, quickly remove heat, lower the coil temperature, and improve the cooling effect. Conversely, the outdoor fan speed is decreased from the third speed range to the second speed range to avoid excessive energy consumption or overcooling, maintaining airflow within a reasonable range. Simultaneously, the compressor's operating frequency can be adjusted to the preset frequency to maintain stable cooling output, avoiding insufficient cooling due to excessively low frequency, and reducing frequent and significant compressor adjustments that could increase energy consumption or cause unstable operation.

[0090] In this embodiment, when the air conditioner's operating current is within a safe range, the speed of the outdoor and indoor fans can be dynamically switched between ranges based on real-time changes in the coil temperature, and the compressor's operating frequency can be adjusted to a preset frequency, thereby achieving coordinated control of the fans and compressor. When the coil temperature exceeds the maximum value of the target temperature range, the outdoor fan speed is increased while the indoor fan speed is reduced to a second speed range, enhancing heat exchange efficiency and preventing further increases in coil temperature. Simultaneously, by fixing the compressor's operating frequency, frequent frequency increases and decreases are reduced, ensuring system stability and energy efficiency. Therefore, this solution not only achieves dual control of coil temperature and operating current, effectively improving the system's heat dissipation and cooling efficiency, but also reduces energy consumption and mechanical shock, improves equipment safety and lifespan, and maintains stable indoor temperature during operation, enhancing user comfort.

[0091] In one embodiment, such as Figure 7 As shown, in step S21, the controller adjusts the speed of the indoor and outdoor fans and the operating frequency of the compressor based on the coil temperature and the air conditioner's operating current, and is configured to execute the following steps: S214: When the coil temperature is higher than the preset temperature, control the outdoor fan to operate within the third speed range, control the indoor fan to operate within the first speed range, and control the compressor to operate within the preset frequency.

[0092] The preset temperature is greater than the minimum value of the target temperature range but less than the maximum value of the target temperature range. For example, if the target temperature range is (-7℃, 5℃), then the preset temperature could be 3℃.

[0093] If the coil temperature is higher than the preset temperature, such as more than 3°C, it indicates that the coil temperature is far from the frosting threshold (-6°C or -7°C), and there is no risk of frosting. In this case, the outdoor fan can be controlled within the third speed range (e.g., 1300 rpm, 1400 rpm) to enhance the outdoor condenser's heat dissipation capacity. Simultaneously, reducing the indoor fan speed to a lower first speed range slows the airflow through the evaporator, increasing the heat absorption of the refrigerant within the evaporator. This prevents excessive airflow from causing a rapid drop in room temperature or a decrease in comfort, thus ensuring effective cooling. At the same time, maintaining a stable compressor operating frequency increases the evaporator's cooling output while preventing current overshoot and compressor overload, ensuring the continuity and stability of the refrigeration cycle.

[0094] S215: When the coil temperature is greater than the minimum value of the target temperature range but less than the preset temperature, control the outdoor fan and indoor fan to operate according to the second speed range, and control the compressor to operate according to the preset frequency.

[0095] When the air conditioner is in cooling mode, the controller compares the coil temperature of the indoor heat exchanger with the target temperature range. If the coil temperature is greater than the minimum value of the target temperature range (e.g., -7℃) but less than the preset temperature (e.g., 3℃), it indicates that the coil temperature is close to or has reached the temperature threshold for coil frosting, posing a certain risk of frosting. At this time, the controller can control the outdoor and indoor fans according to the second speed range, i.e., reducing the outdoor fan speed to medium and increasing the indoor fan speed to medium, thus reducing heat exchange in the condenser (outdoor heat exchanger) and enhancing heat exchange in the evaporator (indoor heat exchanger), increasing the overall system pressure and temperature of the air conditioner to defrost. Simultaneously, the controller controls the compressor operation according to a preset frequency, maintaining the compressor at a stable preset frequency to achieve balanced cooling capacity output, thereby avoiding energy consumption fluctuations caused by frequent start-stops or large adjustments.

[0096] In this embodiment, when the air conditioner is in cooling mode, if the coil temperature is higher than the preset temperature, the outdoor fan is controlled to operate within a third speed range, the indoor fan is controlled to operate within a first speed range, and the compressor is controlled to operate at a preset frequency. If the coil temperature is higher than the minimum value of the target temperature range but lower than the preset temperature, the outdoor and indoor fans are controlled to operate within a second speed range, and the compressor is controlled to operate at a preset frequency. This solution selects different speed ranges to control the indoor and outdoor fans based on the coil temperature range, achieving segmented fan control. This ensures that the heat exchange capacity matches the system load, preventing excessive cold or hot air output that could cause temperature fluctuations while maintaining defrosting effectiveness, thus improving cooling efficiency. It also avoids prolonged operation of the fans and compressor in a high-energy-consumption state, reducing unnecessary energy consumption through reasonable allocation of speed and frequency.

[0097] In a specific embodiment, such as Figure 8 As shown, an air conditioning control method is provided, which is applied to... Figure 1 Taking the controller of a central air conditioner as an example, the controller is configured to perform the following steps: S1: When the air conditioner is in cooling mode, detect the coil temperature of the indoor heat exchanger.

[0098] When the air conditioner is turned on and in cooling mode, the controller can detect the coil temperature of the indoor heat exchanger in real time through a temperature sensor.

[0099] S2: Determine the magnitude of the coil temperature; if the coil temperature is greater than or equal to the preset temperature, proceed to step S3; if the coil temperature is greater than the minimum value of the target temperature range but less than the preset temperature, proceed to step S4; if the coil temperature is less than or equal to the minimum value of the target temperature range, proceed to step S6.

[0100] S3: Control the outdoor fan to run at the third speed setting, control the indoor fan to run at the first speed setting, and control the compressor to run at the preset frequency.

[0101] Both the outdoor and indoor fans include multiple speed settings, each corresponding to a specific speed. The first speed setting corresponds to a speed within a first speed range; the second speed setting corresponds to a speed within a second speed range; and the third speed setting corresponds to a speed within a third speed range. In other words, the speeds corresponding to the first, second, and third speed settings increase sequentially. The speeds corresponding to different settings on the outdoor and indoor fans can be different or the same.

[0102] S4: Control the outdoor fan and indoor fan to operate at their respective second speed settings, and control the compressor to operate at a preset frequency.

[0103] S5: Determine the magnitude of the coil temperature; if the coil temperature is greater than or equal to the preset temperature, proceed to step S3; if the coil temperature is less than or equal to the minimum value of the target temperature range, proceed to step S6.

[0104] S6: Adjust the outdoor fan speed to the first speed range and the indoor fan speed to the second speed range, and check the air conditioner's operating current.

[0105] S7: Determine the magnitude of the air conditioner's operating current; if the air conditioner's operating current is greater than or equal to the maximum value of the preset current range, proceed to step S8. If the air conditioner's operating current is less than the maximum value of the preset current range, proceed to step S6.

[0106] S8: Controls the outdoor fan to operate at the first speed setting, increases the indoor fan speed to the third speed range, and reduces the compressor's operating frequency to the target frequency. Then, adjusts the compressor's operating frequency according to the air conditioner's operating current.

[0107] When the air conditioner's operating current is greater than or equal to the maximum value of the preset current range, the outdoor fan is controlled to operate at the first speed setting, the indoor fan speed is increased to the third speed range, and the compressor's operating frequency is reduced to the target frequency. After reducing to the target frequency, the compressor's operating frequency is adjusted according to the air conditioner's operating current, so that the compressor's operating frequency changes linearly with the air conditioner's operating current and is within the compressor operating frequency range required for the cooling mode.

[0108] S9: Determine the operating current and coil temperature of the air conditioner; if the operating current is less than the maximum value of the preset current range and the coil temperature is greater than the maximum value of the target temperature range, proceed to step S4. If the operating current is greater than or equal to the maximum value of the preset current range, or the coil temperature is less than or equal to the maximum value of the target temperature range, proceed to step S8.

[0109] After adjusting the compressor's operating frequency based on the air conditioner's operating current, the system continues to monitor the air conditioner's operating current and coil temperature, and judges the magnitude of the air conditioner's operating current and coil temperature. When the air conditioner's operating current is less than the maximum value of the preset current range and the coil temperature is greater than the maximum value of the target temperature range, the system controls the outdoor fan and indoor fan to operate at their respective second speed settings, controls the compressor to operate at the preset frequency, and continuously monitors the coil temperature.

[0110] In this embodiment, by dynamically adjusting the speed of the indoor fan, the outdoor fan, and the operating frequency of the compressor based on dual detection of coil temperature and air conditioner operating current in cooling mode, the following technical effects can be achieved: 1. Prevent the coil from becoming too cold or too hot. Through multi-level speed control (first, second, and third levels), the fan speed is increased when the coil temperature is too high to enhance air circulation and heat exchange; when the coil temperature is too low, the fan speed is reduced and current detection is used to prevent the coil temperature from becoming too low and causing frost, thereby ensuring that the evaporator is within a reasonable operating temperature range.

[0111] 2. Improve the stability of the air conditioning system. When the operating current is too high, the solution can reduce the compressor frequency and increase the indoor fan speed to quickly distribute the load and reduce the current pressure. At the same time, it linearly adjusts the compressor frequency according to the current value to avoid frequent and large fluctuations in the compressor, thereby improving the stability and service life of the equipment.

[0112] 3. Improve the energy efficiency and energy saving of the air conditioning system. By combining the control of fan speed and compressor frequency, the system can meet the cooling demand while reducing excessive heat exchange and unnecessary high energy consumption, enabling the system to operate closer to the optimal energy efficiency point under different operating conditions.

[0113] 4. Enhanced comfort. The dynamic speed adjustment of the indoor fan ensures a balance between indoor air temperature and air volume, avoiding sudden changes in temperature and improving the user's comfort experience in cooling mode.

[0114] 5. Ensures the safety and reliability of the air conditioning system. Introducing current monitoring as a protection mechanism automatically adjusts the operation of the compressor and fan when the current is too high, reducing electrical and mechanical loads and preventing damage caused by system overload, thus improving the overall reliability and safety of the air conditioning system.

[0115] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0116] This application also provides an electronic device, such as... Figure 9 As shown, the electronic device 9 includes: at least one processor 901, a memory 902, and a computer program 903 stored in the memory 903 and executable on the at least one processor 901. When the processor 901 executes the computer program 903, it implements the steps in any of the above method embodiments, or when the processor 901 executes the computer program 903, it implements the functions of each module / unit in the above device embodiments.

[0117] For example, the computer program 903 may be divided into one or more modules / units, which are stored in the memory 902 and executed by the processor 901 to complete this application. The one or more modules / units may be a series of computer program instruction segments capable of performing specific functions, which describe the execution process of the computer program 903 in the electronic device.

[0118] Those skilled in the art will understand that Figure 9 The electronic device described is merely an example and does not constitute a limitation on the electronic device. It may include more or fewer components than shown, or combine certain components, or different components. For example, the electronic device may also include input / output devices, network access devices, buses, etc.

[0119] The aforementioned processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor.

[0120] The memory can be an internal storage unit of the electronic device, such as a hard drive or RAM. The memory can also be an external storage device of the electronic device, such as a plug-in hard drive, Smart Media Card (SMC), Secure Digital (SD) card, or Flash Card. Furthermore, the memory can include both internal and external storage units of the electronic device.

[0121] This application also provides a readable storage medium storing a computer program that, when executed by a processor, implements the steps described in the various method embodiments above.

[0122] This application provides a computer program product that, when run on an electronic device, enables the electronic device to perform the steps described in the various method embodiments above.

[0123] If the integrated unit 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, all or part of the processes in the methods of the above embodiments of this application can be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include at least: any entity or device capable of carrying computer program code to a photographing device / terminal device, a recording medium, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium. Examples include USB flash drives, portable hard drives, magnetic disks, or optical disks. In some jurisdictions, according to legislation and patent practice, computer-readable media cannot be electrical carrier signals or telecommunication signals.

[0124] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0125] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0126] In the embodiments provided in this application, it should be understood that the disclosed apparatus / devices and methods can be implemented in other ways. For example, the apparatus / device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0127] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0128] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. An air conditioner, characterized in that, include: Indoor heat exchangers are used for heat exchange with the indoor environment; A compressor is used to compress the gaseous refrigerant flowing out of the indoor heat exchanger; An outdoor heat exchanger is used to exchange heat between the refrigerant flowing out of the compressor and the outdoor environment; An outdoor fan is used to drive outdoor air to flow through the outdoor heat exchanger; The detection device includes a temperature sensor for detecting the coil temperature of the indoor heat exchanger and a current detection module for detecting the air conditioning current. The controller, connected to the compressor, the indoor fan, the outdoor fan, and the detection device, is configured to: The temperature sensor is controlled to detect the coil temperature of the indoor heat exchanger, and the current detection module is controlled to detect the operating current of the air conditioner. When the air conditioner is in cooling mode, the speed of the outdoor fan and the operating frequency of the compressor are adjusted according to the coil temperature of the indoor heat exchanger and the operating current of the air conditioner, so as to control the coil temperature and the air conditioner current.

2. The air conditioner as described in claim 1, characterized in that, It also includes an indoor fan, which drives indoor air to flow through the indoor heat exchanger; The controller, based on the coil temperature of the indoor heat exchanger and the operating current of the air conditioner, adjusts the speed of the outdoor fan and the operating frequency of the compressor, and is configured as follows: Based on the coil temperature and the air conditioner's operating current, the rotation speeds of the indoor and outdoor fans are adjusted, and the operating frequency of the compressor is adjusted, so as to adjust the coil temperature to the target temperature range and the air conditioner's operating current to the preset current range.

3. The air conditioner as described in claim 2, characterized in that, The controller, based on the coil temperature and the air conditioner's operating current, adjusts the speeds of the indoor and outdoor fans, and regulates the compressor's operating frequency, and is configured as follows: When the coil temperature is less than the minimum value of the target temperature range, the speed of the outdoor fan is adjusted to the first speed range, and the speed of the indoor fan is adjusted to the second speed range. When the operating current of the air conditioner is greater than or equal to the maximum value of the preset current range, the outdoor fan is controlled to operate according to the first speed range, the speed of the indoor fan is adjusted to the third speed range, and the operating frequency of the compressor is reduced. The minimum value of the second speed range is greater than the maximum value of the first speed range, and the minimum value of the third speed range is greater than the maximum value of the second speed range.

4. The air conditioner as described in claim 3, characterized in that, The controller is configured to reduce the operating frequency of the compressor. The operating frequency of the compressor is reduced to a target frequency, which is the range of compressor operating frequencies required in the cooling mode; After the frequency is reduced to the target frequency, the operating frequency of the compressor is adjusted according to the operating current of the air conditioner, so that the operating frequency of the compressor changes linearly with the operating current of the air conditioner and is within the compressor operating frequency range required in the cooling mode.

5. The air conditioner as described in claim 3, characterized in that, After reducing the operating frequency of the compressor, the controller is further configured to: When the operating current of the air conditioner is less than the maximum value of the preset current range and the coil temperature is greater than the maximum value of the target temperature range, the outdoor fan and the indoor fan are adjusted to the second speed range, and the operating frequency of the compressor is adjusted to the preset frequency.

6. The air conditioner according to any one of claims 2-5, characterized in that, The controller, based on the coil temperature and the air conditioner's operating current, adjusts the speeds of the indoor and outdoor fans, and regulates the compressor's operating frequency, and is configured as follows: When the coil temperature is greater than the minimum value of the target temperature range but less than the preset temperature, the outdoor fan and the indoor fan are controlled to operate according to the second speed range, and the compressor is controlled to operate according to the preset frequency. The preset temperature is greater than the minimum value of the target temperature range and less than the maximum value of the target temperature range.

7. The air conditioner according to any one of claims 2-5, characterized in that, The controller, based on the coil temperature and the air conditioner's operating current, adjusts the speeds of the indoor and outdoor fans, and regulates the compressor's operating frequency, and is configured as follows: When the coil temperature is higher than the preset temperature, the outdoor fan is controlled to operate within the third speed range, the indoor fan is controlled to operate within the first speed range, and the compressor is controlled to operate at the preset frequency. The minimum value of the third speed range is less than the maximum value of the first speed range; the preset temperature is greater than the minimum value of the target temperature range and less than the maximum value of the target temperature range.

8. An air conditioning control method, characterized in that, The air conditioner is used to regulate the coil temperature and current of the air conditioner. The air conditioner includes an indoor heat exchanger, an outdoor heat exchanger, a compressor, an outdoor fan, and a detection device. The detection device includes a temperature sensor for detecting the coil temperature of the indoor heat exchanger and a current detection module for detecting the current of the air conditioner. The method includes: The temperature sensor is controlled to detect the coil temperature of the indoor heat exchanger, and the current detection module is controlled to detect the operating current of the air conditioner. When the air conditioner is in cooling mode, the speed of the outdoor fan and the operating frequency of the compressor are adjusted according to the coil temperature of the indoor heat exchanger and the operating current of the air conditioner, so as to regulate the coil temperature and the air conditioner current.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the function of the controller in the air conditioner as described in any one of claims 1 to 7, or implements the steps of the air conditioner control method as described in claim 8.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is run, the function of the controller in the air conditioner as described in any one of claims 1 to 7 is realized, or the air conditioner control method as described in claim 8 is executed.

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