Air conditioner

Abstract

The embodiment of the invention discloses an air conditioner which comprises an indoor unit, an outdoor unit and a controller, and the controller is configured to determine whether the air conditioner is in a high-temperature environment or not according to a first outdoor temperature collected by a first temperature sensor and a first coil pipe temperature collected by a second temperature sensor in response to a starting instruction of the air conditioner; under the condition that the air conditioner is in the high-temperature environment, a compressor and an outdoor fan are controlled to operate in the target state within the target duration; after the target duration, a second outdoor temperature collected by the first temperature sensor is obtained; and according to the second outdoor temperature and the target temperature condition, the operation frequency of the compressor and / or the rotating speed of the outdoor fan are / is increased. According to the air conditioner disclosed by the embodiment of the invention, the high-temperature environment is accurately judged, and when the air conditioner operates stably, the operating frequency of the compressor and / or the rotating speed of the outdoor fan are / is increased according to the outdoor temperature and the temperature condition, so that the high-temperature refrigerating capacity of the air conditioner can be exerted to the maximum extent.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and to, but is not limited to, an air conditioner. Background Technology

[0002] Air conditioners are widely used for regulating indoor temperature. When operating under high-temperature conditions, they are prone to malfunction due to abnormal increases in system pressure and temperature. Therefore, current technology typically limits the operating frequency of air conditioners under high-temperature conditions to ensure safe system operation. However, existing frequency-limiting control strategies are flawed, easily leading to insufficient cooling capacity under high-temperature conditions, resulting in poor cooling performance and severely impacting the user experience.

[0003] In addition, the outdoor unit of an air conditioner is usually installed in a poorly ventilated grille or corner, which causes the ambient temperature of the outdoor unit to rise, thereby aggravating the system pressure and temperature abnormality problems, and further deteriorating the indoor cooling effect. Summary of the Invention

[0004] In view of this, the present application provides an air conditioner. The air conditioner disclosed in the present application accurately determines the high-temperature environment and, when the air conditioner is running stably, increases the operating frequency of the compressor and / or increases the speed of the outdoor fan according to the outdoor temperature and temperature conditions, thereby ensuring that the air conditioner can maximize its high-temperature cooling capacity within a reliable operating range and improve user comfort.

[0005] This application provides an air conditioner, including: An indoor unit, the indoor unit including an indoor heat exchanger, the indoor heat exchanger being used to exchange heat between refrigerant and indoor air; The outdoor unit includes a compressor, an outdoor heat exchanger, an outdoor fan, a first temperature sensor, and a second temperature sensor. The compressor drives the refrigerant to circulate, the outdoor heat exchanger facilitates heat exchange between the refrigerant and outdoor air, and the outdoor fan drives outdoor air through the outdoor heat exchanger to exchange heat between the refrigerant and outdoor air. The first temperature sensor collects the outdoor temperature, and the second temperature sensor is located on the coil of the outdoor heat exchanger to collect the coil temperature. The controller, electrically connected to the compressor and the outdoor fan respectively, is configured to control the operating frequency of the compressor and the rotational speed of the outdoor fan; The controller is configured as follows: In response to the power-on command of the air conditioner, the system determines whether the air conditioner is in a high-temperature environment based on the first outdoor temperature collected by the first temperature sensor and the first coil temperature collected by the second temperature sensor. When the air conditioner is in a high-temperature environment, the compressor and the outdoor fan are controlled to operate in a target state for a target duration. The target state includes the compressor having a target frequency and the outdoor fan having a target speed. After the target duration, the second outdoor temperature collected by the first temperature sensor is obtained; Based on the second outdoor temperature and the target temperature condition, increase the operating frequency of the compressor and / or increase the speed of the outdoor fan.

[0006] In the above technical solution, firstly, a dual judgment is made based on the first outdoor temperature and the first coil temperature to determine whether the air conditioner is in a high-temperature environment. This improves the accuracy of high-temperature environment identification and effectively avoids detection errors that may exist when relying on a single temperature sensor, preventing the air conditioner from unnecessarily entering a restricted operation mode. Secondly, in a high-temperature environment, the compressor is controlled to run at a target frequency and the outdoor fan at a target speed for a target duration, establishing stable initial operating conditions for the air conditioner. At the same time, the target duration ensures that the operating parameters remain stable. Finally, after the target duration, the compressor's operating frequency and / or the outdoor fan speed are increased based on the second outdoor temperature and the target temperature conditions. This allows for reasonable optimization of operating parameters according to the actual outdoor environment, maximizing the air conditioner's high-temperature cooling capacity while ensuring the safe and stable operation of the system. This not only ensures the system's reliability under high-temperature conditions but also improves the cooling capacity.

[0007] In some embodiments, the controller is configured to: The operating frequency of the compressor is increased based on the second outdoor temperature, the target temperature condition, and the first operating current of the outdoor unit.

[0008] In the above technical solution, more precise parameter adjustment is achieved by using both the second outdoor temperature and the first operating current as judgment criteria. First, judging based on the second outdoor temperature and the target temperature ensures that subsequent frequency increase operations match the current outdoor temperature requirements, while avoiding system overload or insufficient heat dissipation caused by blindly increasing the frequency when the ambient temperature exceeds a reasonable range. Second, frequency adjustment based on the first operating current assesses the load capacity of the outdoor unit, ensuring both the reliability of system operation and maximizing the cooling performance of the air conditioner.

[0009] In some embodiments, the controller is configured to: When the second outdoor temperature meets the first temperature condition and the first operating current is less than the current frequency-increase protection value of the compressor, the operating frequency of the compressor is increased. The first temperature condition includes the temperature threshold corresponding to controlling the compressor to be in the current adaptive frequency modulation state. The target temperature condition includes the first temperature condition.

[0010] In the above technical solution, when the second outdoor temperature meets the first temperature condition, it can ensure that the compressor starts frequency adjustment only within the temperature range that is compatible with adaptive frequency regulation, avoiding blind frequency increase in the non-frequency regulation temperature range; at the same time, the compressor's operating frequency is increased only when the first operating current is less than the compressor's current-prohibited frequency increase protection value, ensuring that the frequency is adjusted within the current safety range, thereby significantly improving the cooling response speed and cooling performance under high temperature conditions while ensuring stable system operation.

[0011] In some embodiments, the air conditioner further includes a third temperature sensor disposed at the compressor's exhaust port for detecting the compressor's exhaust temperature, and the controller is further configured to: The second coil temperature collected by the second temperature sensor and the exhaust temperature collected by the third temperature sensor are obtained. If any one of the following parameters—the second operating current of the outdoor unit, the exhaust temperature, and the second coil temperature—is greater than or equal to the corresponding frequency-increase protection value, the operating frequency of the compressor shall remain unchanged.

[0012] In the above technical solution, when any one of the outdoor unit's second operating current, exhaust temperature, or second coil temperature is greater than or equal to its corresponding frequency increase prohibition protection value, the frequency increase is stopped and the compressor's operating frequency remains unchanged. Through the coordinated judgment of multiple parameters, operational risks can be perceived from multiple dimensions, and the frequency increase can be stopped in time to prevent performance degradation and equipment damage caused by air conditioner overload or overheating. This effectively avoids the frequency increase prohibition protection blind spot caused by the limitation of a single parameter, thereby maintaining the stable and safe operation of the air conditioner under high temperature and complex operating conditions.

[0013] In some embodiments, the controller is further configured to: If the second operating current, the exhaust temperature, and the second coil temperature are all less than the corresponding frequency increase protection values, the operating frequency of the compressor is increased.

[0014] In the above technical solution, when the second operating current, exhaust temperature and second coil temperature of the outdoor unit are less than the corresponding frequency increase prohibition protection value, the equipment can be ensured to be in a safe and stable operating state. Thus, under the premise that the equipment load capacity allows, the cooling effect can be enhanced by increasing the operating frequency of the compressor, so that the air conditioner can meet the requirements of safe operation while further improving the refrigerant circulation and cooling capacity.

[0015] In some embodiments, the controller is configured to: The third outdoor temperature collected by the first temperature sensor is obtained, and the detection time between the second outdoor temperature and the third outdoor temperature is a first preset time interval. Determine a first temperature difference between the second outdoor temperature and the third outdoor temperature; When the first temperature difference meets the second temperature condition, the speed of the outdoor fan is increased. The second temperature condition is that the first temperature difference is greater than the first temperature difference threshold. The target temperature condition includes the second temperature condition.

[0016] In the above technical solution, by obtaining the second outdoor temperature and the third outdoor temperature at a first preset time interval and calculating the first temperature difference between the two, the change range of outdoor temperature in a short period of time can be objectively and accurately reflected. When the first temperature difference is greater than the first temperature difference threshold, the speed of the outdoor fan is increased, which can ensure that the speed is increased only when the change rate of outdoor temperature is high, thereby enhancing the heat dissipation efficiency of the outdoor heat exchanger and preventing the cooling effect from being affected due to insufficient heat dissipation.

[0017] In some embodiments, the air conditioner further includes a fourth temperature sensor disposed on the outdoor fan for detecting the IPM temperature of the intelligent power module (IPM) of the outdoor fan, and the controller is further configured to: After maintaining the outdoor fan speed at the increased speed for a second preset time period, the IPM temperature collected by the fourth temperature sensor is obtained. If the IPM temperature is lower than the IPM temperature threshold, increase the rotational speed of the outdoor fan.

[0018] In the above technical solution, by maintaining the rotation speed for a second preset time period and then acquiring the IPM temperature collected by the fourth temperature sensor, the IPM temperature under stable operating conditions can be accurately reflected, ensuring the accuracy of the IPM temperature. If the IPM temperature is lower than the IPM temperature threshold, the rotation speed of the outdoor fan is increased, thereby increasing the rotation speed under the premise that the IPM temperature is within a safe range, thereby enhancing the heat dissipation efficiency of the outdoor heat exchanger.

[0019] In some embodiments, the controller is further configured to: If the IPM temperature is greater than or equal to the IPM temperature threshold, the outdoor fan speed is maintained at the increased speed, or the outdoor fan speed is reduced.

[0020] In the above technical solution, when the IPM temperature is greater than or equal to the IPM temperature threshold, by maintaining the outdoor fan at the increased speed or reducing the speed, the IPM temperature can be effectively prevented from continuously rising and exceeding the safe operating range, thereby improving the reliability of the system. By reasonably limiting the fan speed, unnecessary energy consumption can be avoided while meeting the heat dissipation requirements, thus achieving a balance between the system's heat dissipation performance and operating energy efficiency.

[0021] In some embodiments, the controller is configured to: If the first outdoor temperature is greater than the outdoor temperature threshold, and the second temperature difference between the first coil temperature and the first outdoor temperature is less than the second temperature difference threshold, the air conditioner is determined to be in a high-temperature environment.

[0022] In the above technical solution, when the first outdoor temperature exceeds the outdoor temperature threshold, it indicates that the outdoor ambient temperature has reached the high-temperature standard. Simultaneously, this solution also uses the temperature difference between the first coil temperature and the first outdoor temperature as a judgment criterion. This effectively avoids detection errors that may arise from relying solely on a single temperature sensor, and prevents the air conditioner from unnecessarily entering a restricted operating mode, thus avoiding problems such as cooling capacity fluctuations and increased energy consumption caused by blindly limiting or increasing frequency. This solution improves the reliability of high-temperature environment judgment while laying a solid foundation for subsequent precise control of compressor frequency and fan speed.

[0023] In some embodiments, the controller is further configured to: When the air conditioner is not in a high-temperature environment or the second outdoor temperature does not meet the target temperature condition, the operating frequency of the compressor and / or the speed of the outdoor fan shall remain unchanged.

[0024] In the above technical solution, if the air conditioner is not in a high-temperature environment or the second outdoor temperature does not meet the target temperature condition, it means that there is no need to increase the cooling capacity of the air conditioner under the current operating environment. At this time, keeping the compressor operating frequency and / or the outdoor fan speed unchanged can reduce unnecessary energy consumption, maintain the stable operation of the compressor and outdoor fan under the current operating conditions, and ensure the overall stability and reliability of the air conditioner. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with this application and, together with the specification, serve to explain the technical solutions of this application.

[0026] Figure 1 This is a schematic diagram of the structure of an air conditioner disclosed in an embodiment of this application; Figure 2 This is a schematic diagram of another air conditioner disclosed in the embodiments of this application; Figure 3 This is a schematic flowchart of a control method for an air conditioner controller disclosed in an embodiment of this application; Figure 4 This is a flowchart illustrating another control method for an air conditioner controller disclosed in an embodiment of this application; Figure 5 This is a flowchart illustrating another control method for an air conditioner controller disclosed in an embodiment of this application; Figure 6 This is a flowchart illustrating another control method for an air conditioner controller disclosed in an embodiment of this application; Figure 7 This is a flowchart illustrating another control method for an air conditioner controller disclosed in an embodiment of this application; Figure 8 This is a flowchart illustrating another control method for an air conditioner controller disclosed in an embodiment of this application; Figure 9 This is a schematic flowchart of another control method for an air conditioner controller disclosed in an embodiment of this application; Figure 10 This is a schematic flowchart of another control method for an air conditioner controller disclosed in an embodiment of this application. Detailed Implementation

[0027] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0028] To facilitate a clear description of the technical solutions in the embodiments of this application, the terms "first" and "second" are used in the embodiments of this application to distinguish identical or similar items with essentially the same function and effect. For example, "first instruction" and "second instruction" are used to distinguish different user instructions and do not limit their order. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and the terms "first" and "second" are not necessarily different.

[0029] It should be noted that, in this application, the words "exemplarily" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplarily" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of words such as "exemplarily" or "for example" is intended to present the relevant concepts in a specific manner.

[0030] Furthermore, "at least one" refers to one or more, while "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, and c can mean: a, or b, or c, or a and b, or a and c, or b and c, or a, b, and c, where a, b, and c can be single or multiple.

[0031] Furthermore, the terms "comprising" and "having," and any variations thereof, in the embodiments and drawings of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0032] Air conditioners are widely used for regulating indoor temperature. When operating in cooling mode under high-temperature conditions, the temperature difference between the outdoor heat exchanger and the outdoor air decreases significantly, preventing the refrigerant from condensing effectively. This causes the outdoor coil temperature and compressor discharge pressure to rise continuously. If the pressure and temperature exceed safe thresholds, it will not only increase the compressor's operating load but may also lead to equipment failure, affecting the safe operation of the air conditioner. Therefore, current technology typically limits the operating frequency of air conditioners under high-temperature conditions to reduce the refrigerant circulation volume and ensure safe system operation.

[0033] However, the existing frequency limiting control strategy is unreasonable. In high-temperature environments, the frequency is limited too early or too much, resulting in insufficient refrigerant flow, a significant reduction in the cooling capacity of the indoor heat exchanger, and difficulty in quickly reducing the indoor temperature, which seriously affects the user experience.

[0034] Furthermore, in actual installation scenarios, the outdoor unit of an air conditioner is usually installed in a poorly ventilated grille or corner, which prevents the heat generated by the outdoor unit from dissipating in time. This causes the ambient temperature of the outdoor unit to rise, thereby exacerbating the system pressure and temperature abnormalities, and ultimately leading to a further deterioration in the indoor cooling effect.

[0035] In view of this, this application provides an air conditioner including an indoor unit, an outdoor unit, and a controller. The controller is configured to: in response to a start command of the air conditioner, determine whether the air conditioner is in a high-temperature environment based on a first outdoor temperature collected by a first temperature sensor and a first coil temperature collected by a second temperature sensor; when the air conditioner is in a high-temperature environment, control the compressor and the outdoor fan to operate in a target state for a target duration, the target state including a target frequency for the compressor and a target speed for the outdoor fan; after the target duration, acquire a second outdoor temperature collected by the first temperature sensor; and increase the operating frequency of the compressor and / or increase the speed of the outdoor fan based on the second outdoor temperature and the target temperature condition. The air conditioner disclosed in this application, by accurately determining the high-temperature environment, increases the operating frequency of the compressor and / or increases the speed of the outdoor fan based on the second outdoor temperature and the target temperature condition when the air conditioner is in a stable operating state, thereby ensuring that the air conditioner can maximize its high-temperature cooling capacity within a reliable operating range and improve user comfort.

[0036] It should be understood that the refrigerant mentioned in this application is the same as the refrigerant.

[0037] To make the purpose and technical solution of this application clearer and more intuitive, the household appliances disclosed in this application will be described in detail below with reference to the accompanying drawings.

[0038] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of an air conditioner disclosed in an embodiment of this application. Figure 1 The air conditioner shown includes an indoor unit 100 and an outdoor unit 200. The indoor unit 100 is used to regulate the indoor air temperature. The outdoor unit 200 is connected to the indoor unit 100 via a connecting pipe. The outdoor unit 200 is installed outdoors, and the indoor unit 100 is installed indoors. The connecting pipe between the indoor unit 100 and the outdoor unit 200 can be a long connecting pipe. The length of this connecting pipe is greater than or equal to a set length threshold, which can be set empirically and is not limited here.

[0039] Please see Figure 2 , Figure 2 This is a schematic diagram of another air conditioner disclosed in an embodiment of this application. Figure 2 The air conditioner shown includes: an indoor heat exchanger 110, a compressor 210, an outdoor heat exchanger 220, a four-way valve 230, and an expansion valve 300. The indoor heat exchanger 110 is installed on the indoor unit 100, and the compressor 210, the outdoor heat exchanger 220, the four-way valve 230, and the expansion valve 300 are installed on the outdoor unit 200.

[0040] It should be noted that the expansion valve 300 can also be installed on the indoor unit 100, or the number of expansion valves 300 can be multiple, including an indoor expansion valve installed on the indoor unit 100 and an outdoor expansion valve installed on the outdoor unit 200, which is not limited here.

[0041] In this embodiment, the air conditioner also includes a refrigerant pipeline for circulating the refrigerant in a loop formed by the compressor 210, the indoor heat exchanger 110, and the outdoor heat exchanger 220; the air conditioner also includes an outdoor fan, a first temperature sensor, a second temperature sensor, and a controller.

[0042] The indoor heat exchanger 110, connected to the compressor 210 and the controller, is configured to exchange heat with the indoor air through a refrigerant. Specifically, it is used as an evaporator to absorb indoor heat during cooling and as a condenser to release heat into the room during heating.

[0043] The compressor 210 is connected to the controller, the indoor heat exchanger 110 and the outdoor heat exchanger 220, and is used to drive the refrigerant circulation. Specifically, it is used to compress the refrigerant in a low-pressure state to a high-pressure state and drive the refrigerant to circulate in the refrigerant pipeline.

[0044] The outdoor heat exchanger 220 is connected to the compressor 210 and the controller. It is used to exchange heat between the refrigerant and the outdoor air. Specifically, it is used as a condenser to release heat to the outside during cooling and as an evaporator to absorb heat from the outside during heating.

[0045] The outdoor fan, connected to the controller, is used to drive outdoor air through the outdoor heat exchanger 220 by rotation, so that the refrigerant can exchange heat with the outdoor air.

[0046] The first temperature sensor is used to collect the outdoor temperature of the outdoor environment.

[0047] The second temperature sensor is installed on the coil of the outdoor heat exchanger 220 to collect the coil temperature.

[0048] The controller is the control center of the air conditioner, connecting all components of the air conditioner through various interfaces and lines. For example, the controller can be electrically connected to the compressor 210 and the outdoor fan respectively, and is configured to control the operating frequency of the compressor and the speed of the outdoor fan; Optionally, the controller may include one or more processing units; the controller may integrate an application processor and a modem processor, wherein the application processor mainly handles the operating system, user interface, and applications, and the modem processor mainly handles wireless communication. It is understood that the modem processor may also not be integrated into the controller.

[0049] An air conditioner includes a refrigerant circulation loop composed of various components and pipes. The refrigerant circulates within the loop consisting of a compressor 210, an outdoor heat exchanger 220, an expansion valve 300, an indoor heat exchanger 110, and a four-way valve 230. The direction of refrigerant flow in the circulation loop differs depending on the air conditioner's operating mode. The air conditioner's operating modes can include cooling mode or heating mode, and the four-way valve 230 changes the refrigerant flow direction. In cooling mode, the refrigerant first flows through the outdoor heat exchanger 220, where the outdoor unit 200 acts as the condenser and the indoor unit 100 as the evaporator. In heating mode, the refrigerant first flows through the indoor heat exchanger 110, where the indoor unit 100 acts as the condenser and the outdoor unit 200 as the evaporator.

[0050] It should be noted that, Figure 2 The components of the air conditioner illustrated herein do not constitute a specific limitation on the air conditioner. The air conditioner may include more or fewer components than illustrated, or combine certain components, or separate certain components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of both. That is, the air conditioner disclosed in the embodiments of this application may also include… Figure 2 Other components not shown.

[0051] Figure 2 The schematic diagram of the air conditioner shown provides a convenient understanding of the internal structure of the air conditioner disclosed in this application embodiment, as well as the functions of each component constituting the air conditioner. Based on this, the following will further describe how the air conditioner disclosed in this application embodiment increases the compressor's operating frequency and / or increases the outdoor fan speed according to the second outdoor temperature and target temperature conditions. The increase in compressor operating frequency and / or increase in outdoor fan speed proposed in this application embodiment can be controlled by a controller. For ease of description, the descriptions of the various components of the air conditioner below will not include... Figure 2 The labels for the components shown are exemplary; for example, compressor 210 is described by way of compressor.

[0052] Please see Figure 3 , Figure 3 This is a flowchart illustrating a control method for an air conditioner controller disclosed in an embodiment of this application. Figure 3 The control method shown includes the following steps: Step 301: In response to the power-on command of the air conditioner, the controller determines whether the air conditioner is in a high-temperature environment based on the first outdoor temperature collected by the first temperature sensor and the first coil temperature collected by the second temperature sensor.

[0053] In some embodiments, it can be determined whether the air conditioner is in a high-temperature environment based on a first outdoor temperature.

[0054] For example, if the first outdoor temperature is greater than an outdoor temperature threshold, the air conditioner is determined to be in a high-temperature environment; if the first outdoor temperature is less than or equal to the outdoor temperature threshold, the air conditioner is determined not to be in a high-temperature environment. It should be understood that the outdoor temperature threshold is a preset high-temperature environment entry temperature.

[0055] For example, if the outdoor temperature threshold is 38℃ and the first outdoor temperature is 40℃, which is greater than the outdoor temperature threshold (38℃), then the air conditioner is in a high-temperature environment; if the first outdoor temperature is 36℃, which is less than the outdoor temperature threshold (38℃), then the air conditioner is not in a high-temperature environment.

[0056] In some embodiments, if the first outdoor temperature is greater than an outdoor temperature threshold and the second temperature difference between the first coil temperature and the first outdoor temperature is less than a second temperature difference threshold, the air conditioner is determined to be in a high-temperature environment.

[0057] For example, if the outdoor temperature threshold is 38°C, the second temperature difference threshold is 2°C, the first outdoor temperature is 40°C, and the first coil temperature is 41°C, then the second temperature difference is 1°C. The first outdoor temperature (40°C) is greater than the outdoor temperature threshold (38°C), and the second temperature difference (1°C) is less than the second temperature difference threshold (2°C), thus determining that the air conditioner is in a high-temperature environment.

[0058] It should be understood that, under normal circumstances, the temperature difference between the outdoor temperature and the coil temperature at the moment of power-on is small; therefore, the second temperature difference threshold should be a small value. By determining the temperature difference between the first coil temperature and the first outdoor temperature, misjudgments caused by detection errors of the first temperature sensor can be prevented.

[0059] In other embodiments, the air conditioner is determined not to be in a high-temperature environment if the first outdoor temperature is less than or equal to an outdoor temperature threshold, or if the second temperature difference between the first coil temperature and the first outdoor temperature is greater than or equal to a second temperature difference threshold.

[0060] For example, in conjunction with the above embodiments, if the first outdoor temperature is 40°C and the first coil temperature is 37°C, then the second temperature difference is 3°C. The first outdoor temperature (40°C) is greater than the outdoor temperature threshold (38°C), and the second temperature difference (3°C) is greater than the second temperature difference threshold (2°C), thus determining that the air conditioner is not in a high-temperature environment.

[0061] As can be seen, implementing the above embodiments indicates that when the first outdoor temperature exceeds the outdoor temperature threshold, the outdoor ambient temperature has reached the high-temperature standard. Simultaneously, this solution also uses the temperature difference between the first coil temperature and the first outdoor temperature as a judgment criterion, effectively avoiding detection errors that may arise from relying solely on a single temperature sensor. This prevents the air conditioner from unnecessarily entering a restricted operating mode, thus avoiding problems such as cooling capacity fluctuations and increased energy consumption caused by blindly limiting or increasing frequency. This solution improves the reliability of high-temperature environment judgment while laying a solid foundation for subsequent precise control of compressor frequency and fan speed.

[0062] Step 302: When the air conditioner is in a high-temperature environment, the controller controls the compressor and outdoor fan to operate in a target state for a target duration. The target state includes the compressor operating at a target frequency and the outdoor fan operating at a target speed.

[0063] Optionally, the target frequency and target speed are preset operating parameters set to cope with high-temperature environments, aiming to achieve a reasonable balance between safe system operation and cooling effect. For example, the target frequency is usually lower than the compressor's rated high frequency, and the target speed can be higher than the outdoor fan's normal operating speed but lower than the maximum rated speed.

[0064] For example, if the compressor's rated high frequency is 120 Hz, the target frequency can be set to 80 Hz; if the outdoor fan's normal operating speed is 500 rpm and its maximum rated speed is 800 rpm, the target speed can be set to 600 rpm.

[0065] It is understandable that by controlling the compressor and outdoor fan to operate in the target state within the target time, the operating parameters of the air conditioner, such as temperature parameters, can be kept stable.

[0066] In other embodiments, the operating frequency of the compressor and / or the speed of the outdoor fan are kept constant when the air conditioner is not in a high-temperature environment.

[0067] Step 303: After the target duration, the controller acquires the second outdoor temperature collected by the first temperature sensor.

[0068] For example, the target duration could be 10 minutes.

[0069] It should be understood that while the outdoor fan speed and compressor frequency can respond quickly after adjustment, temperature parameters such as outdoor ambient temperature and heat exchanger coil temperature are affected by environmental heat dissipation and refrigerant circulation efficiency, and their change rate is much slower than the adjustment speed of frequency and speed. Therefore, obtaining the second outdoor temperature after the target duration can avoid temperature fluctuations in the initial stage of parameter adjustment, ensuring that the second outdoor temperature is outdoor environmental data after the air conditioner has been running stably for a period of time, and more objectively reflects the current true temperature.

[0070] Step 304: The controller increases the operating frequency of the compressor and / or increases the speed of the outdoor fan based on the second outdoor temperature and the target temperature conditions.

[0071] In some embodiments, if the second outdoor temperature meets the target temperature condition, the operating frequency of the compressor and / or the speed of the outdoor fan are increased.

[0072] For example, if the second outdoor temperature is within the temperature threshold range or greater than the temperature threshold, the operating frequency of the compressor and / or the speed of the outdoor fan are increased.

[0073] In other embodiments, if the second outdoor temperature does not meet the target temperature condition, the operating frequency of the compressor and / or the speed of the outdoor fan are kept constant.

[0074] As can be seen, when the air conditioner is not in a high-temperature environment or the second outdoor temperature does not meet the target temperature condition, it means that there is no need to increase the cooling capacity of the air conditioner under the current operating environment. At this time, keeping the compressor operating frequency and / or the outdoor fan speed unchanged can reduce unnecessary energy consumption, maintain the stable operation of the compressor and outdoor fan under the current operating conditions, and ensure the overall stability and reliability of the air conditioner.

[0075] It should be understood that increasing the compressor's operating frequency accelerates the refrigerant circulation, thereby delivering more refrigerant to the indoor heat exchanger per unit time and enhancing cooling capacity. However, this also increases the workload of the compressor motor, leading to a corresponding increase in its operating load, energy consumption, and heat generation. Increasing the outdoor fan speed enhances the airflow through the outdoor heat exchanger, improving heat exchange efficiency and aiding in system heat dissipation; however, excessively high speeds also increase fan energy consumption and generate more noticeable operating noise.

[0076] As can be seen, implementing the above embodiments firstly, by making dual judgments based on the first outdoor temperature and the first coil temperature, it is determined whether the air conditioner is in a high-temperature environment. This improves the accuracy of high-temperature environment identification and effectively avoids detection errors that may exist when relying solely on a single temperature sensor, preventing the air conditioner from unnecessarily entering a restricted operating mode. Secondly, by controlling the compressor to run at a target frequency and the outdoor fan to run at a target speed for a target duration in a high-temperature environment, stable initial operating conditions are established for the air conditioner. At the same time, the target duration ensures that the operating parameters remain stable. Finally, after the target duration, the compressor's operating frequency and / or the outdoor fan speed are increased based on the second outdoor temperature and the target temperature conditions. This allows for reasonable optimization of operating parameters according to the actual outdoor environment, maximizing the air conditioner's high-temperature cooling capacity while ensuring the safe and stable operation of the system. This not only ensures the system's reliability under high-temperature conditions but also improves its cooling capacity.

[0077] The following is combined with Figure 4 The details explain how to increase the compressor's operating frequency based on the second outdoor temperature and the target temperature conditions.

[0078] Please see Figure 4 , Figure 4 This is a flowchart illustrating another control method for an air conditioner controller disclosed in an embodiment of this application. Figure 4 The control method shown includes the following steps: Step 401: In response to the power-on command of the air conditioner, the controller determines whether the air conditioner is in a high-temperature environment based on the first outdoor temperature collected by the first temperature sensor and the first coil temperature collected by the second temperature sensor.

[0079] For the specific implementation of step 401, please refer to the content of step 301 above, which will not be repeated here.

[0080] Step 402: When the air conditioner is in a high-temperature environment, the controller controls the compressor and outdoor fan to operate in the target state for the target duration.

[0081] For the specific implementation of step 402, please refer to the content of step 302 above, which will not be repeated here.

[0082] Step 403: After the target duration, the controller acquires the second outdoor temperature collected by the first temperature sensor.

[0083] For the specific implementation of step 403, please refer to the content of step 303 above, which will not be repeated here.

[0084] Step 404: The controller increases the operating frequency of the compressor based on the second outdoor temperature, the target temperature condition, and the first operating current of the outdoor unit.

[0085] In some embodiments, if the second outdoor temperature meets the target temperature condition and the first operating current meets the current condition, the operating frequency of the compressor is increased.

[0086] In some embodiments, when the second outdoor temperature meets the first temperature condition and the first operating current is less than the compressor's current-limited frequency-increase protection value, the compressor's operating frequency is increased. The first temperature condition includes the temperature threshold corresponding to controlling the compressor to be in current-adaptive frequency regulation mode, and the target temperature condition includes the first temperature condition.

[0087] It should be understood that the current frequency increase restriction protection value is a preset current safety threshold, representing the maximum operating current that the outdoor unit can withstand under safe operation conditions. When the operating current reaches or exceeds the current frequency increase restriction protection value, it means that the outdoor unit is approaching or has reached an overload state. Continuing to increase the compressor frequency will further increase the current, which may lead to problems such as motor overheating and circuit failure. The temperature threshold corresponding to the compressor's current adaptive frequency adjustment state mentioned above refers to the ability to adaptively adjust the compressor frequency based on the current when the second outdoor temperature meets this temperature threshold, i.e., increase the compressor frequency.

[0088] For example, the first temperature condition is T1 < second outdoor temperature < T2, where T1 and T2 are preset temperature values. For example, T1 = 38℃, T2 = 55℃.

[0089] For example, in conjunction with the above embodiments, when the second outdoor temperature is greater than T1 and less than T2, and the first operating current is less than the compressor's current frequency restriction protection value, the compressor's operating frequency is increased. For example, if the second outdoor temperature is 45°C, the first operating current is 10A, the current frequency restriction protection value is 12A, the second outdoor temperature (45°C) is greater than T1 (38°C) and less than T2 (55°C), and the first operating current (10A) is less than the compressor's current frequency restriction protection value (12A), then the compressor's operating frequency is increased.

[0090] In other embodiments, the compressor's operating frequency is kept constant if the second outdoor temperature does not meet the first temperature condition, or if the first operating current is greater than or equal to the compressor's current-limited frequency protection value.

[0091] For example, in conjunction with the above embodiments, when the second outdoor temperature is less than T1 or greater than T2, or when the first operating current is greater than or equal to the compressor's current frequency inversion protection value, the operating frequency of the compressor is kept constant.

[0092] As can be seen, by implementing the above embodiments, when the second outdoor temperature meets the first temperature condition, it can be ensured that the compressor starts frequency adjustment only within the temperature range suitable for adaptive frequency regulation, avoiding blind frequency increase in the non-frequency regulation temperature range; at the same time, the compressor's operating frequency is increased only when the first operating current is less than the compressor's current-limited frequency increase protection value, ensuring that the frequency is adjusted within the current safety range, thereby significantly improving the cooling response speed and cooling performance under high-temperature conditions while ensuring stable system operation.

[0093] In some embodiments, the operating frequency of the compressor can be increased according to a preset frequency ramp rate. For example, the preset frequency ramp rate is 10 s / Hz.

[0094] As can be seen, by implementing the above embodiments and using both the second outdoor temperature and the first operating current as the judgment criteria, more precise parameter adjustment is achieved. First, judging based on the second outdoor temperature and the target temperature condition ensures that subsequent frequency increase operations match the current outdoor temperature requirements, while avoiding system overload or insufficient heat dissipation caused by blindly increasing the frequency when the ambient temperature exceeds a reasonable range. Second, adjusting the frequency based on the first operating current allows for the assessment of the outdoor unit's load capacity, ensuring both the reliability of system operation and maximizing the cooling performance of the air conditioner.

[0095] Please see Figure 5 , Figure 5 This is a flowchart illustrating another control method for an air conditioner controller disclosed in an embodiment of this application. Figure 5 The control method shown includes the following steps: Step 501: The controller acquires the second coil temperature collected by the second temperature sensor and the exhaust temperature collected by the third temperature sensor.

[0096] In some embodiments, combined with Figure 2 The air conditioner also includes a third temperature sensor, which is located at the exhaust port of the compressor 210 and is used to detect the exhaust temperature of the compressor 210.

[0097] For example, the second temperature sensor collects the second coil temperature at 45°C, and the third temperature sensor collects the exhaust temperature at 50°C.

[0098] Step 502: If any one of the outdoor unit's second operating current, exhaust temperature, and second coil temperature is greater than or equal to the corresponding frequency-increase-prohibition protection value, the controller will maintain the compressor's operating frequency unchanged.

[0099] It is understandable that both the second operating current and the first operating current are the operating currents of the outdoor unit, but they are obtained at different times.

[0100] It should be understood that the frequency increase restriction protection value is a safety upper limit threshold set for the second operating current, exhaust temperature, and second coil temperature to limit the compressor's frequency increase. Specifically, the frequency increase restriction protection value corresponding to the second operating current is the preset outdoor unit frequency increase restriction current; the frequency increase restriction protection value corresponding to the exhaust temperature is the preset compressor exhaust protection frequency increase restriction temperature; and the frequency increase restriction protection value corresponding to the coil temperature is the preset outdoor coil overload protection frequency increase restriction temperature. For example, the frequency increase restriction protection values ​​corresponding to the outdoor unit's second operating current, exhaust temperature, and second coil temperature are 14A, 98℃, and 63℃, respectively.

[0101] For example, in conjunction with the above example, the second operating current is 10A, the exhaust temperature is 90℃, and the second coil temperature is 67℃. The second coil temperature (67℃) is greater than the corresponding frequency upscaling protection value (63℃). The second operating current and the exhaust temperature are both less than their respective corresponding frequency upscaling protection values, so the operating frequency of the compressor remains unchanged.

[0102] In some embodiments, if the second operating current, exhaust temperature, and second coil temperature are less than the corresponding frequency increase protection value, the operating frequency of the compressor is increased.

[0103] It should be understood that if the second operating current, exhaust temperature, and second coil temperature are less than the corresponding frequency upscaling protection values, it means that all three operating parameters are within a safe range, i.e., the equipment is currently in a safe and stable operating state.

[0104] For example, in conjunction with the above embodiments, if the second operating current is 10A, the exhaust temperature is 90°C, and the second coil temperature is 60°C, and the second coil temperature, the second operating current, and the exhaust temperature are all less than their respective corresponding frequency increase protection values, then the operating frequency of the compressor is increased.

[0105] As can be seen, by implementing the above embodiments, when the second operating current, exhaust temperature and second coil temperature of the outdoor unit are less than the corresponding frequency increase prohibition protection value, the equipment can be ensured to be in a safe and stable operating state. Thus, under the premise that the equipment load capacity allows, the cooling effect can be enhanced by increasing the operating frequency of the compressor, so that the air conditioner can meet the requirements of safe operation while further improving the refrigerant circulation and cooling capacity.

[0106] As can be seen, by implementing the above embodiments, when any one of the parameters of the second operating current, exhaust temperature, or second coil temperature of the outdoor unit is greater than or equal to its corresponding frequency increase prohibition protection value, the frequency increase is stopped and the compressor's operating frequency remains unchanged. Through the coordinated judgment of multiple parameters, the operational risks of the equipment can be perceived from multiple angles, and the frequency increase can be stopped in time to prevent performance degradation and equipment damage caused by air conditioner overload or overheating. This effectively avoids the frequency increase prohibition protection blind spot caused by the limitation of a single parameter, thereby maintaining the stable and safe operation of the air conditioner under high temperature and complex operating conditions.

[0107] The above embodiments describe increasing the compressor's operating frequency based on the second outdoor temperature and the target temperature conditions. The following will combine... Figure 6 The details explain how to increase the speed of the outdoor fan based on the second outdoor temperature and the target temperature conditions.

[0108] Please see Figure 6 , Figure 6 This is a flowchart illustrating another control method for an air conditioner controller disclosed in an embodiment of this application. Figure 6The control method shown includes the following steps: Step 601: In response to the power-on command of the air conditioner, the controller determines whether the air conditioner is in a high-temperature environment based on the first outdoor temperature collected by the first temperature sensor and the first coil temperature collected by the second temperature sensor.

[0109] For the specific implementation of step 601, please refer to the content of step 301 above, which will not be repeated here.

[0110] Step 602: When the air conditioner is in a high-temperature environment, the controller controls the compressor and outdoor fan to operate in the target state for the target duration.

[0111] For the specific implementation of step 602, please refer to the content of step 302 above, which will not be repeated here.

[0112] Step 603: After the target duration, the controller acquires the second outdoor temperature collected by the first temperature sensor.

[0113] For the specific implementation of step 603, please refer to the content of step 303 above, which will not be repeated here.

[0114] Step 604: The controller acquires the third outdoor temperature collected by the first temperature sensor. The detection time between the second and third outdoor temperatures is a first preset time interval.

[0115] It should be understood that collecting the second and third outdoor temperatures before and after the first preset duration is to determine the change in outdoor temperature over a short period of time; therefore, the first preset duration should be a relatively short time. For example, the first preset duration is 10 seconds.

[0116] For example, the first temperature sensor collects a second outdoor temperature of 41°C and a third outdoor temperature of 40°C.

[0117] Step 605: The controller determines the first temperature difference between the second outdoor temperature and the third outdoor temperature.

[0118] For example, in conjunction with the above example, the first temperature difference between the second outdoor temperature (41°C) and the third outdoor temperature (40°C) is 1°C.

[0119] Step 606: If the first temperature difference meets the second temperature condition, the controller increases the speed of the outdoor fan. The second temperature condition is that the first temperature difference is greater than a first temperature difference threshold, and the target temperature condition includes the second temperature condition.

[0120] It should be understood that the first temperature difference between the second and third outdoor temperatures reflects the changes in outdoor temperature over a short period of time. When the first temperature difference meets the second temperature condition, it indicates that the outdoor temperature has changed significantly in a short period of time, possibly due to poor ventilation or other reasons causing a rapid rise in outdoor temperature. In this case, it is necessary to increase the outdoor fan speed to enhance heat dissipation and avoid a decrease in heat exchange efficiency that would affect the cooling effect.

[0121] In some embodiments, if the first temperature difference is greater than a first temperature difference threshold, the speed of the outdoor fan is increased. For example, the first temperature difference threshold is 5°C, the first temperature difference is 6°C, and if the first temperature difference (6°C) is greater than the first temperature difference threshold (5°C), then the speed of the outdoor fan is increased.

[0122] In other embodiments, the outdoor fan speed is kept constant when the first temperature difference is less than or equal to a first temperature difference threshold. For example, in conjunction with the above example, if the first temperature difference threshold is 5°C, the first temperature difference is 1°C, and the first temperature difference (1°C) is less than the first temperature difference threshold (5°C), then the outdoor fan speed is kept constant.

[0123] In some embodiments, the rotational speed of the outdoor fan can be increased according to preset rules.

[0124] For example, the preset rule can be a fixed speed increment. For instance, 50 rpm. If the outdoor fan speed is 500 rpm, then after increasing the outdoor fan speed according to the preset rule, the speed will be 550 rpm.

[0125] As can be seen, by implementing the above embodiments, by obtaining the second outdoor temperature and the third outdoor temperature at a first preset time interval and calculating the first temperature difference between the two, the change range of outdoor temperature in a short period of time can be objectively and accurately reflected; when the first temperature difference is greater than the first temperature difference threshold, the speed of the outdoor fan is increased, which can ensure that the speed is increased only when the change rate of outdoor temperature is high, thereby enhancing the heat dissipation efficiency of the outdoor heat exchanger and preventing the cooling effect from being affected by insufficient heat dissipation.

[0126] Please see Figure 7 , Figure 7 This is a flowchart illustrating another control method for an air conditioner controller disclosed in an embodiment of this application. Figure 7 The control method shown includes the following steps: Step 701: After the controller maintains the outdoor fan speed at the increased speed for a second preset time period, it acquires the IPM temperature collected by the fourth temperature sensor.

[0127] In some embodiments, combined with Figure 2The air conditioner also includes a fourth temperature sensor, which is installed on the outdoor fan and is used to detect the IPM temperature of the intelligent power module (IPM) of the outdoor fan.

[0128] For example, the increased rotational speed is 550 rpm. After maintaining the outdoor fan speed at 550 rpm for a second preset time period, the IPM temperature collected by the fourth temperature sensor is obtained. For example, the IPM temperature is 80°C.

[0129] It should be understood that the rate of temperature change is much slower than the rate of rotation speed adjustment. Therefore, acquiring the IPM temperature after a second preset time period ensures the accuracy of the acquired IPM temperature. For example, the second preset time period is 5 minutes.

[0130] Step 702: When the IPM temperature is lower than the IPM temperature threshold, the controller increases the speed of the outdoor fan.

[0131] It should be understood that the IPM temperature threshold is based on the preset IPM frequency-prohibition temperature of the outdoor motor. For example, the IPM temperature threshold is 85℃.

[0132] For example, if the IPM temperature is 75°C, and the IPM temperature (75°C) is less than the IPM temperature threshold (85°C), then the speed of the outdoor fan will be increased.

[0133] As can be seen, by implementing the above embodiments, after maintaining the rotation speed for the second preset time period and then acquiring the IPM temperature collected by the fourth temperature sensor, the IPM temperature under stable operating conditions can be accurately reflected, ensuring the accuracy of the IPM temperature. If the IPM temperature is less than the IPM temperature threshold, the rotation speed of the outdoor fan is increased, thereby increasing the rotation speed while the IPM temperature is within a safe range, thus enhancing the heat dissipation efficiency of the outdoor heat exchanger.

[0134] Please see Figure 8 , Figure 8 This is a flowchart illustrating another control method for an air conditioner controller disclosed in an embodiment of this application. Figure 8 The control method shown includes the following steps: Step 801: After the controller maintains the outdoor fan speed at the increased speed for a second preset time period, it acquires the IPM temperature collected by the fourth temperature sensor.

[0135] For the specific implementation of step 801, please refer to the content of step 701 above, which will not be repeated here.

[0136] Step 802: When the IPM temperature is greater than or equal to the IPM temperature threshold, the controller maintains the outdoor fan speed at the increased speed or reduces the outdoor fan speed.

[0137] In some embodiments, when the IPM temperature is greater than or equal to the IPM temperature threshold, the outdoor fan speed is maintained at the increased speed, i.e., the increase in the outdoor fan speed is stopped.

[0138] For example, if the IPM temperature is 87°C and the IPM temperature threshold is 85°C, and the IPM temperature (87°C) is greater than the IPM temperature threshold (85°C), then the outdoor fan speed will be maintained at the increased speed.

[0139] In other embodiments, the speed of the outdoor fan is reduced when the IPM temperature is greater than or equal to the IPM temperature threshold.

[0140] For example, in conjunction with the above example, if the IPM temperature (87°C) is greater than the IPM temperature threshold (85°C), then the speed of the outdoor fan will be reduced.

[0141] In some embodiments, the rotational speed of the outdoor fan can be reduced according to a preset rule.

[0142] For example, the preset rule can be a fixed speed increment, such as 30 rpm. If the outdoor fan speed is 550 rpm, then after reducing the outdoor fan speed according to the preset rule, the speed will be 520 rpm.

[0143] In some embodiments, after reducing the speed of the outdoor fan, the outdoor fan speed is maintained at the reduced speed for a third preset time period, and then the IPM temperature collected by the fourth temperature sensor is acquired; if the IPM temperature is less than the IPM temperature threshold, the outdoor fan speed is maintained at the reduced speed.

[0144] For example, in conjunction with the above example, the third preset duration is 5 minutes. After reducing the speed of the outdoor fan, the speed of the outdoor fan is maintained at 520 rpm for 5 minutes. The IPM temperature collected by the fourth temperature sensor is obtained. For example, the IPM temperature is 84℃. If the IPM temperature (84℃) is less than the IPM temperature threshold (85℃), the speed of the outdoor fan is maintained at 520 rpm.

[0145] As can be seen, by implementing the above embodiments, when the IPM temperature is greater than or equal to the IPM temperature threshold, maintaining the outdoor fan at the increased speed or reducing the speed can effectively prevent the IPM temperature from continuously rising and exceeding the safe operating range, thereby improving the reliability of the system. By reasonably limiting the fan speed, unnecessary energy consumption can be avoided while meeting the heat dissipation requirements, achieving a balance between the system's heat dissipation performance and operating energy efficiency.

[0146] Please see Figure 9 , Figure 9This is a flowchart illustrating another control method for an air conditioner controller disclosed in an embodiment of this application. Figure 9 The control method shown includes the following steps: Step 901: In response to the power-on command of the air conditioner, the controller determines whether the air conditioner is in a high-temperature environment based on the first outdoor temperature collected by the first temperature sensor and the first coil temperature collected by the second temperature sensor.

[0147] For the specific implementation of step 901, please refer to the content of step 301 above, which will not be repeated here.

[0148] Step 9021: When the air conditioner is in a high-temperature environment, the controller controls the compressor and outdoor fan to operate in the target state for the target duration.

[0149] For the specific implementation of step 9021, please refer to the content of step 302 above, which will not be repeated here.

[0150] Step 9022: When the air conditioner is not in a high-temperature environment, the controller maintains the compressor's operating frequency and / or the outdoor fan speed unchanged.

[0151] Step 903: After the target duration, the controller acquires the second outdoor temperature collected by the first temperature sensor.

[0152] For the specific implementation of step 903, please refer to the content of step 303 above, which will not be repeated here.

[0153] Step 9041: When the second outdoor temperature meets the first temperature condition and the first operating current is less than the compressor's current-limited frequency protection value, the controller increases the compressor's operating frequency.

[0154] Step 9042: If the second outdoor temperature does not meet the first temperature condition, or if the first operating current is greater than or equal to the compressor's current frequency inversion protection value, the controller maintains the compressor's operating frequency unchanged.

[0155] Step 905: The controller acquires the second coil temperature collected by the second temperature sensor and the exhaust temperature collected by the third temperature sensor.

[0156] For the specific implementation of step 905, please refer to the content of step 501 above, which will not be repeated here.

[0157] Step 9061: If any one of the outdoor unit's second operating current, exhaust temperature, and second coil temperature is greater than or equal to the corresponding frequency-increase-prohibition protection value, the controller will maintain the compressor's operating frequency unchanged.

[0158] For the specific implementation of step 9061, please refer to the content of step 502 above, which will not be repeated here.

[0159] Step 9062: If the second operating current, exhaust temperature, and second coil temperature are less than the corresponding frequency increase prevention protection value, the controller increases the operating frequency of the compressor.

[0160] Please see Figure 10 , Figure 10 This is a flowchart illustrating another control method for an air conditioner controller disclosed in an embodiment of this application. Figure 10 The control method shown includes the following steps: Step 1001: In response to the power-on command of the air conditioner, the controller determines whether the air conditioner is in a high-temperature environment based on the first outdoor temperature collected by the first temperature sensor and the first coil temperature collected by the second temperature sensor.

[0161] For the specific implementation of step 1001, please refer to the content of step 301 above, which will not be repeated here.

[0162] Step 10021: When the air conditioner is in a high-temperature environment, the controller controls the compressor and outdoor fan to operate in the target state for the target duration.

[0163] For the specific implementation of step 10021, please refer to the content of step 302 above, which will not be repeated here.

[0164] Step 10022: When the air conditioner is not in a high-temperature environment, the controller maintains the compressor's operating frequency and / or the outdoor fan's speed unchanged.

[0165] Step 1003: After the target duration, the controller acquires the second outdoor temperature collected by the first temperature sensor.

[0166] For the specific implementation of step 1003, please refer to the content of step 303 above, which will not be repeated here.

[0167] Step 1004: The controller acquires the third outdoor temperature collected by the first temperature sensor.

[0168] For the specific implementation of step 1004, please refer to the content of step 604 above, which will not be repeated here.

[0169] Step 1005: The controller determines the first temperature difference between the second outdoor temperature and the third outdoor temperature.

[0170] For the specific implementation of step 1005, please refer to the content of step 605 above, which will not be repeated here.

[0171] Step 10061: When the first temperature difference meets the second temperature condition, the controller increases the speed of the outdoor fan.

[0172] For the specific implementation of step 10061, please refer to the content of step 606 above, which will not be repeated here.

[0173] Step 10062: If the first temperature difference is less than or equal to the first temperature difference threshold, the controller keeps the speed of the outdoor fan constant.

[0174] Step 1007: After the controller maintains the outdoor fan speed at the increased speed for the second preset time period, it acquires the IPM temperature collected by the fourth temperature sensor.

[0175] For the specific implementation of step 1007, please refer to the content of step 701 above, which will not be repeated here.

[0176] Step 10081: When the IPM temperature is lower than the IPM temperature threshold, the controller increases the speed of the outdoor fan.

[0177] For the specific implementation of step 10081, please refer to the content of step 702 above, which will not be repeated here.

[0178] Step 10082: When the IPM temperature is greater than or equal to the IPM temperature threshold, the controller maintains the outdoor fan speed at the increased speed or reduces the outdoor fan speed.

[0179] For the specific implementation of step 10082, please refer to the content of step 802 above, which will not be repeated here.

[0180] It should be understood that although the steps in the above flowcharts are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the above flowcharts may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps. In addition, the above embodiments can be implemented independently or in combination with each other, without limitation.

[0181] It should be understood that the phrases "one embodiment," "an embodiment," or "some embodiments" mentioned throughout the specification mean that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this application. Therefore, "in one embodiment," "in one embodiment," or "in some embodiments" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It should be understood that in the various embodiments of this application, the sequence numbers of the above-described processes do not imply a sequential 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 this application. The sequence numbers of the above-described embodiments are merely for descriptive purposes and do not represent the superiority or inferiority of the embodiments. The descriptions of the various embodiments above tend to emphasize the differences between the various embodiments; their similarities or commonalities can be referred to mutually, and for the sake of brevity, they will not be repeated here.

[0182] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three kinds of relationships. For example, object A and / or object B can represent three situations: object A exists alone, object A and object B exist simultaneously, and object B exists alone.

[0183] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0184] In implementation, each step of the above method can be completed by integrated logic circuits in the processor's hardware or by instructions in software. The steps of the method disclosed in the embodiments of this application can be directly manifested as execution by a hardware processor, or as a combination of hardware and software modules within the processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. This storage medium is located in memory, and the processor executes the instructions in the memory, combining them with its hardware to complete the steps of the above method. To avoid repetition, detailed descriptions are omitted here.

[0185] 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.

[0186] In the several embodiments provided in this application, it should be understood that the disclosed products and methods can be implemented in other ways. The embodiments described above are merely illustrative. For example, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods, such as: multiple modules or components can be combined, or integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the various components shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or modules, and can be electrical, mechanical, or other forms.

[0187] 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.

[0188] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0189] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to related technologies, or a portion 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 described in the various embodiments of this application. 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] The above description is merely an embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An air conditioner, characterized in that, include: An indoor unit, the indoor unit including an indoor heat exchanger, the indoor heat exchanger being used to exchange heat between refrigerant and indoor air; The outdoor unit includes a compressor, an outdoor heat exchanger, an outdoor fan, a first temperature sensor, and a second temperature sensor. The compressor drives the refrigerant to circulate, the outdoor heat exchanger facilitates heat exchange between the refrigerant and outdoor air, and the outdoor fan drives outdoor air through the outdoor heat exchanger to exchange heat between the refrigerant and outdoor air. The first temperature sensor collects the outdoor temperature, and the second temperature sensor is located on the coil of the outdoor heat exchanger to collect the coil temperature. The controller, electrically connected to the compressor and the outdoor fan respectively, is configured to control the operating frequency of the compressor and the rotational speed of the outdoor fan; The controller is configured as follows: In response to the power-on command of the air conditioner, the system determines whether the air conditioner is in a high-temperature environment based on the first outdoor temperature collected by the first temperature sensor and the first coil temperature collected by the second temperature sensor. When the air conditioner is in a high-temperature environment, the compressor and the outdoor fan are controlled to operate in a target state for a target duration. The target state includes the compressor having a target frequency and the outdoor fan having a target speed. After the target duration, the second outdoor temperature collected by the first temperature sensor is obtained; Based on the second outdoor temperature and the target temperature condition, increase the operating frequency of the compressor and / or increase the speed of the outdoor fan.

2. The air conditioner according to claim 1, characterized in that, The controller is configured to: The operating frequency of the compressor is increased based on the second outdoor temperature, the target temperature condition, and the first operating current of the outdoor unit.

3. The air conditioner according to claim 2, characterized in that, The controller is configured to: When the second outdoor temperature meets the first temperature condition and the first operating current is less than the current frequency-increase protection value of the compressor, the operating frequency of the compressor is increased. The first temperature condition includes the temperature threshold corresponding to controlling the compressor to be in the current adaptive frequency modulation state. The target temperature condition includes the first temperature condition.

4. The air conditioner according to any one of claims 1-3, characterized in that, The air conditioner also includes a third temperature sensor, which is disposed at the exhaust port of the compressor for detecting the exhaust temperature of the compressor. The controller is further configured to: The second coil temperature collected by the second temperature sensor and the exhaust temperature collected by the third temperature sensor are obtained. If any one of the following parameters—the second operating current of the outdoor unit, the exhaust temperature, and the second coil temperature—is greater than or equal to the corresponding frequency-increase protection value, the operating frequency of the compressor shall remain unchanged.

5. The air conditioner according to claim 4, characterized in that, The controller is also configured to: If the second operating current, the exhaust temperature, and the second coil temperature are all less than the corresponding frequency increase protection values, the operating frequency of the compressor is increased.

6. The air conditioner according to claim 1, characterized in that, The controller is configured to: The third outdoor temperature collected by the first temperature sensor is obtained, and the detection time between the second outdoor temperature and the third outdoor temperature is a first preset time interval. Determine a first temperature difference between the second outdoor temperature and the third outdoor temperature; When the first temperature difference meets the second temperature condition, the speed of the outdoor fan is increased. The second temperature condition is that the first temperature difference is greater than the first temperature difference threshold. The target temperature condition includes the second temperature condition.

7. The air conditioner according to claim 6, characterized in that, The air conditioner also includes a fourth temperature sensor, which is disposed on the outdoor fan and used to detect the IPM temperature of the intelligent power module (IPM) of the outdoor fan. The controller is further configured to: After maintaining the outdoor fan speed at the increased speed for a second preset time period, the IPM temperature collected by the fourth temperature sensor is obtained. If the IPM temperature is lower than the IPM temperature threshold, increase the rotational speed of the outdoor fan.

8. The air conditioner according to claim 7, characterized in that, The controller is also configured to: If the IPM temperature is greater than or equal to the IPM temperature threshold, the outdoor fan speed is maintained at the increased speed, or the outdoor fan speed is reduced.

9. The air conditioner according to claim 1, characterized in that, The controller is configured to: If the first outdoor temperature is greater than the outdoor temperature threshold, and the second temperature difference between the first coil temperature and the first outdoor temperature is less than the second temperature difference threshold, the air conditioner is determined to be in a high-temperature environment.

10. The air conditioner according to claim 1, characterized in that, The controller is also configured to: When the air conditioner is not in a high-temperature environment or the second outdoor temperature does not meet the target temperature condition, the operating frequency of the compressor and / or the speed of the outdoor fan shall remain unchanged.

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