Air conditioner and outdoor fan control method and device thereof, controller and storage medium

Abstract

The invention discloses an air conditioner and an outdoor fan control method and device thereof, a controller and a storage medium. The method comprises the steps that in the working process of the air conditioner, working parameters of the air conditioner are obtained; wherein the working parameters comprise the working current of the fixed frequency compressor, the refrigerant outlet temperature of the outdoor heat exchanger, the temperature difference value between the refrigerant outlet temperature and the outdoor environment temperature, or the refrigerant outlet pressure of the outdoor heat exchanger; and the operation rotating speed of the outdoor fan is optimized based on the working parameters to obtain the optimal operation rotating speed, so that the influence of the outdoor heat exchanger on the load of the fixed-frequency compressor in the heavy load state is reduced, the working efficiency of the air conditioner in the light load state is improved, and the energy consumption ratio of the air conditioner can be increased.

Description

Technical Field

[0001] This invention relates to the field of fan control, and more particularly to an air conditioner and its outdoor fan control method, device, controller, and storage medium. Background Technology

[0002] In the air conditioning industry, fixed-frequency air conditioners still enjoy a relatively broad application market due to their low manufacturing cost and high cost-effectiveness. Currently, in fixed-frequency air conditioners, the outdoor fan typically operates at a fixed speed, meaning it runs at high speeds for extended periods to ensure stable operation of the fixed-frequency compressor. However, this prolonged high-speed operation leads to increased energy consumption, thus reducing the air conditioner's energy efficiency ratio. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, the first objective of this invention is to propose a method for controlling the outdoor fan of an air conditioner. This method involves acquiring operating parameters such as the operating current of the fixed-frequency compressor during the air conditioner's operation, and using these parameters to optimize the operating speed of the outdoor fan. This reduces the impact of the outdoor heat exchanger on the load of the fixed-frequency compressor under heavy load conditions and improves the air conditioner's efficiency under light load conditions, thereby effectively improving the air conditioner's energy efficiency ratio.

[0004] A second objective of this invention is to provide a computer-readable storage medium.

[0005] The third objective of this invention is to provide a controller.

[0006] The fourth objective of this invention is to provide an outdoor fan control device for an air conditioner.

[0007] The fifth objective of this invention is to provide an air conditioner.

[0008] To achieve the above objectives, a first aspect of the present invention provides a method for controlling the outdoor fan of an air conditioner. The air conditioner includes an outdoor fan, a fixed-frequency compressor, and an outdoor heat exchanger. The method includes: acquiring operating parameters of the air conditioner during operation; wherein the operating parameters include the operating current of the fixed-frequency compressor, the refrigerant outlet temperature of the outdoor heat exchanger, the temperature difference between the refrigerant outlet temperature and the outdoor ambient temperature, or the refrigerant outlet pressure of the outdoor heat exchanger; and optimizing the operating speed of the outdoor fan based on the operating parameters to obtain an optimal operating speed, so as to reduce the impact of the outdoor heat exchanger on the load of the fixed-frequency compressor under heavy load conditions and improve the operating efficiency of the air conditioner under light load conditions.

[0009] According to the outdoor fan control method of the present invention, during the operation of the air conditioner, the operating parameters such as the operating current of the fixed-frequency compressor in the air conditioner are obtained, and the operating speed of the outdoor fan is optimized to obtain the optimal operating speed. This reduces the impact of the outdoor heat exchanger on the load of the fixed-frequency compressor under heavy load and improves the working efficiency of the air conditioner under light load, thereby effectively improving the energy efficiency ratio of the air conditioner.

[0010] According to one embodiment of the present invention, optimizing the operating speed of an outdoor fan based on operating parameters to obtain an optimal operating speed includes: when the operating parameters are less than a first operating parameter threshold, gradually reducing the operating speed of the outdoor fan until the increase in the operating parameters is greater than a preset threshold to obtain the optimal operating speed; when the operating parameters are greater than a second operating parameter threshold, first increasing the operating speed of the outdoor fan to a first preset speed, and after the outdoor fan is running stably, gradually reducing the operating speed of the outdoor fan until the increase in the operating parameters is greater than the preset threshold to obtain the optimal operating speed; wherein, the second operating parameter threshold is greater than the first operating parameter threshold.

[0011] According to one embodiment of the present invention, gradually reducing the operating speed of an outdoor fan until the increase in operating parameters exceeds a preset threshold to obtain the optimal operating speed includes: reducing the operating speed of the outdoor fan by a preset step size, and after the outdoor fan is running stably, obtaining the current operating parameters; if the difference between the current operating parameters and the operating parameters before the gradual reduction of the outdoor fan's operating speed is less than or equal to the preset threshold, returning to the step of reducing the operating speed of the outdoor fan by a preset step size; and if the difference between the current operating parameters and the operating parameters before the gradual reduction of the outdoor fan's operating speed is greater than the preset threshold, increasing the operating speed of the outdoor fan by a preset step size to obtain the optimal operating speed.

[0012] According to one embodiment of the present invention, the first preset speed is the maximum allowable speed of the outdoor fan.

[0013] According to one embodiment of the present invention, the optimal operating speed of the outdoor fan is obtained by optimizing the operating speed based on the operating parameters, and the method further includes: keeping the operating speed of the outdoor fan unchanged when the operating parameters are greater than or equal to a first operating parameter threshold and less than or equal to a second operating parameter threshold.

[0014] According to one embodiment of the present invention, the outdoor fan is a DC fan.

[0015] To achieve the above objectives, a second aspect of the present invention provides a computer-readable storage medium having a program stored thereon that, when executed by a processor, implements the aforementioned method for controlling the outdoor fan of an air conditioner.

[0016] According to the computer-readable storage medium of the present invention, the aforementioned outdoor fan control method for an air conditioner can reduce the impact of the outdoor heat exchanger on the load of the fixed-frequency compressor under heavy load conditions and improve the working efficiency of the air conditioner under light load conditions, thereby effectively improving the energy efficiency ratio of the air conditioner.

[0017] To achieve the above objectives, a third aspect of the present invention provides a controller, comprising: a memory, a processor, and a program stored in the memory and executable on the processor, wherein when the processor executes the program, it implements the aforementioned method for controlling the outdoor fan of an air conditioner.

[0018] According to the controller of the present invention, the outdoor fan control method of the air conditioner described above can reduce the impact of the outdoor heat exchanger on the load of the fixed-frequency compressor under heavy load and improve the working efficiency of the air conditioner under light load, thereby effectively improving the energy efficiency ratio of the air conditioner.

[0019] To achieve the above objectives, a fourth aspect of the present invention provides an outdoor fan control device for an air conditioner. The air conditioner includes an outdoor fan, a fixed-frequency compressor, and an outdoor heat exchanger. The device includes: an acquisition module for acquiring operating parameters of the air conditioner during operation; wherein the operating parameters include the operating current of the fixed-frequency compressor, the refrigerant outlet temperature of the outdoor heat exchanger, the temperature difference between the refrigerant outlet temperature and the outdoor ambient temperature, or the refrigerant outlet pressure of the outdoor heat exchanger; and a control module for optimizing the operating speed of the outdoor fan based on the operating parameters to obtain an optimal operating speed, so as to reduce the impact of the outdoor heat exchanger on the load of the fixed-frequency compressor under heavy load conditions and improve the energy efficiency ratio of the air conditioner under light load conditions.

[0020] According to the outdoor fan control device of the present invention, during the operation of the air conditioner, the acquisition module obtains the operating parameters such as the operating current of the fixed-frequency compressor in the air conditioner, and the control module optimizes the operating speed of the outdoor fan based on the operating parameters to obtain the optimal operating speed. This reduces the impact of the outdoor heat exchanger on the load of the fixed-frequency compressor under heavy load and improves the working efficiency of the air conditioner under light load, thereby effectively improving the energy efficiency ratio of the air conditioner.

[0021] To achieve the above objectives, a fifth aspect of the present invention provides an air conditioner including the aforementioned controller or the aforementioned outdoor fan control device.

[0022] According to the embodiments of the present invention, the air conditioner can reduce the impact of the outdoor heat exchanger on the load of the fixed-frequency compressor under heavy load conditions and improve the working efficiency of the air conditioner under light load conditions through the aforementioned controller or the aforementioned outdoor fan control device, thereby effectively improving the energy efficiency ratio of the air conditioner.

[0023] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of an air conditioner according to an embodiment of the present invention;

[0025] Figure 2 A flowchart of an outdoor fan control method according to an embodiment of the present invention;

[0026] Figure 3 A flowchart of a method for reducing the operating speed of an outdoor fan according to an embodiment of the present invention;

[0027] Figure 4 A flowchart of an outdoor fan control method according to another embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of a controller according to an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of an outdoor fan control device according to an embodiment of the present invention;

[0030] Figures 7a-7b This is a schematic diagram of the structure of an air conditioner according to some embodiments of the present invention. Detailed Implementation

[0031] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0032] The following description, with reference to the accompanying drawings, outlines an outdoor fan control method, a computer-readable storage medium, a controller, an outdoor fan control device, and an air conditioner according to embodiments of the present invention.

[0033] It should be noted that the outdoor fan control method of this invention can be applied to air conditioners including an outdoor fan, a fixed-frequency compressor, and an outdoor heat exchanger. The following will use... Figure 1 The air conditioner shown illustrates the outdoor fan control method of an embodiment of the present invention. (Refer to...) Figure 1 As shown, the air conditioner 100 includes an outdoor fan 110, a fixed-frequency compressor 120, and an outdoor heat exchanger 130.

[0034] Specifically, the fixed-frequency compressor 120 and the outdoor heat exchanger 130 are mainly used to realize the heat exchange cycle of the air conditioner 100. The fixed-frequency compressor 120 compresses the refrigerant inside the air conditioner 100 into a high-pressure, high-temperature gas. The outdoor heat exchanger 130, which can be a condenser or evaporator, is mainly used to control the heat exchange between the refrigerant and the outdoor air. For example, in cooling mode, the outdoor heat exchanger 130 mainly dissipates heat from the high-pressure, high-temperature gas input to the compressor 120, causing the dissipated gas to recondense back into refrigerant, thus realizing the heat exchange cycle of the air conditioner 100. The outdoor fan 110 mainly assists in the refrigerant heat exchange within the outdoor heat exchanger 130. In actual operation, the outdoor fan affects the heat exchange efficiency of the outdoor heat exchanger 130, which in turn interferes with the operation of the fixed-frequency compressor 120. Therefore, related technologies typically control the outdoor fan to operate continuously at a higher speed to provide a stable operating environment for the fixed-frequency compressor 120. However, this also results in additional energy consumption for the outdoor fan 110, which in turn reduces the operating efficiency of the air conditioner.

[0035] Figure 2 A flowchart of an outdoor fan control method according to an embodiment of the present invention is provided, with reference to... Figure 2 As shown, the method includes:

[0036] S11. During the operation of the air conditioner, acquire the operating parameters of the air conditioner; among which, the operating parameters include the operating current of the fixed frequency compressor, the refrigerant outlet temperature of the outdoor heat exchanger, the temperature difference between the refrigerant outlet temperature and the outdoor ambient temperature, or the refrigerant outlet pressure of the outdoor heat exchanger.

[0037] Specifically, the operating parameters of an air conditioner refer to physical quantities that reflect the load on the fixed-frequency compressor. When the fixed-frequency compressor is under heavy load, its operating current is higher, and the outdoor heat exchanger needs to increase the refrigerant flow rate, resulting in a higher refrigerant outlet pressure and a larger temperature difference between the refrigerant outlet temperature and the outdoor ambient temperature. Therefore, the operating current of the fixed-frequency compressor, the temperature difference between the refrigerant outlet temperature and the outdoor ambient temperature, or the refrigerant outlet pressure of the outdoor heat exchanger can be used as operating parameters to reflect the load on the fixed-frequency compressor.

[0038] Alternatively, the refrigerant outlet temperature of the outdoor heat exchanger can be used as an operating parameter for the air conditioner. In cooling mode, a higher refrigerant outlet temperature indicates more frequent heat exchange and a faster refrigerant flow rate, resulting in a heavier load on the fixed-frequency compressor. In heating mode, a lower refrigerant outlet temperature similarly indicates more frequent heat exchange and a heavier load on the fixed-frequency compressor.

[0039] S12, based on the working parameters, optimizes the operating speed of the outdoor fan to obtain the optimal operating speed, so as to reduce the impact of the outdoor heat exchanger on the load of the fixed frequency compressor under heavy load and improve the working efficiency of the air conditioner under light load.

[0040] Specifically, the required outdoor fan speed varies depending on the load condition of the fixed-frequency compressor. When the fixed-frequency compressor is under heavy load, the outdoor heat exchanger needs to exchange heat with the outdoor air frequently, thus requiring a higher outdoor fan speed. Increasing the outdoor fan speed at this time can increase the airflow velocity around the outdoor heat exchanger, thereby improving the heat exchange efficiency of the outdoor heat exchanger. Conversely, when the fixed-frequency compressor is under light load, the heat exchange frequency of the outdoor heat exchanger is lower, and the required outdoor fan speed is also lower. In this case, reducing the outdoor fan speed can reduce the energy consumption of the outdoor fan without affecting the heat exchange efficiency of the outdoor heat exchanger. Therefore, the method of this embodiment, after obtaining the operating parameters, further optimizes the outdoor fan speed based on the operating parameters to obtain the optimal operating speed, that is, it obtains the outdoor fan operating speed corresponding to the lowest operating parameters through a search optimization method. Under heavy load, the obtained optimal operating speed is larger, which can reduce the impact of the outdoor heat exchanger on the load of the fixed-frequency compressor under heavy load, thereby reducing the load of the fixed-frequency compressor, avoiding additional energy consumption by the fixed-frequency compressor, and thus improving the energy efficiency ratio of the air conditioner. The optimal operating speed obtained under light load conditions is relatively small, which reduces the energy consumption of the outdoor fan and improves the working efficiency of the air conditioner under light load conditions, thus also improving the energy efficiency ratio of the air conditioner.

[0041] In the above embodiments, by acquiring the operating parameters such as the operating current of the fixed-frequency compressor in the air conditioner during its operation, and using these parameters to optimize the operating speed of the outdoor fan, the optimal operating speed is obtained. This reduces the impact of the outdoor heat exchanger on the load of the fixed-frequency compressor under heavy load conditions and improves the operating efficiency of the air conditioner under light load conditions, thereby effectively improving the energy efficiency ratio of the air conditioner.

[0042] Optionally, the outdoor fan can be a DC fan. Compared with AC fans, DC fans have more flexible speed adjustment, thus reducing the difficulty of adjusting the fan's operating speed.

[0043] In some embodiments, optimizing the operating speed of the outdoor fan based on operating parameters to obtain the optimal operating speed includes: when the operating parameters are less than a first operating parameter threshold, gradually reducing the operating speed of the outdoor fan until the increase in the operating parameters is greater than a preset threshold to obtain the optimal operating speed; when the operating parameters are greater than a second operating parameter threshold, first increasing the operating speed of the outdoor fan to a first preset speed, and after the outdoor fan is running stably, gradually reducing the operating speed of the outdoor fan until the increase in the operating parameters is greater than the preset threshold to obtain the optimal operating speed; wherein, the second operating parameter threshold is greater than the first operating parameter threshold.

[0044] Specifically, the first operating parameter threshold is used to measure whether the fixed-frequency compressor is under light load, and the second operating parameter threshold is used to measure whether the fixed-frequency compressor is under heavy load. The first and second operating parameter thresholds can be determined through pre-calibration, pre-setting, etc., and the second operating parameter threshold is greater than the first operating parameter threshold. The preset threshold is used to measure whether the increase in operating parameters is effective, and the preset threshold can be set in advance.

[0045] In actual operation, if the acquired operating parameters are less than the first operating parameter threshold, it indicates that the fixed-frequency compressor is under light load. At this time, the outdoor heat exchanger requires a lower outdoor fan speed. Therefore, the outdoor fan's operating speed can be gradually reduced while the operating parameters are monitored in real time to reduce the outdoor fan's energy consumption. Initially, because the outdoor heat exchanger's demand for outdoor fan speed is low, the reduction in operating speed will not affect the heat exchanger's efficiency, and the detected operating parameters remain unchanged. However, as the outdoor fan's operating speed gradually decreases, it will eventually become insufficient to meet the outdoor heat exchanger's needs, at which point the detected operating parameters will rise. Therefore, when the detected operating parameters increase, and the increase exceeds the preset threshold, it indicates that the reduction in operating speed has led to a decrease in the outdoor heat exchanger's heat exchange efficiency, which in turn increases the load on the fixed-frequency compressor, resulting in additional energy consumption. If the outdoor fan speed is further reduced at this point, the overall energy consumption of the air conditioner will increase. Therefore, the reduction of the outdoor fan speed can be stopped, and the current outdoor fan speed can be taken as the optimal operating speed. The optimal operating speed obtained at this time can reduce the energy consumption of the outdoor fan as much as possible without affecting the heat exchange efficiency of the outdoor heat exchanger, thereby improving the working efficiency of the air conditioner under light load conditions.

[0046] When the acquired operating parameters exceed the second operating threshold, the fixed-frequency compressor is under heavy load. At this time, the outdoor heat exchanger requires a higher outdoor fan speed. Therefore, the outdoor fan speed can be initially increased to a first preset speed to meet the needs of the outdoor heat exchanger and prevent the fixed-frequency compressor load from increasing due to insufficient outdoor fan speed. The first preset speed can be a pre-set outdoor fan speed, preferably the maximum allowable speed of the outdoor fan. After the outdoor fan stabilizes, its operating speed is gradually reduced to decrease its energy consumption. Simultaneously, the operating parameters are monitored in real time. Initially, since the outdoor fan speed has already increased to the first preset speed, it may already meet the needs of the outdoor heat exchanger, so the reduction in operating speed may not affect the heat exchange efficiency, and the detected operating parameters remain unchanged. However, when the detected operating parameters increase, and the increase exceeds the preset threshold, it indicates that the reduction in operating speed has led to a decrease in the heat exchange efficiency of the outdoor heat exchanger, resulting in an increase in the load on the fixed-frequency compressor. In this case, the fixed-frequency compressor will generate additional energy consumption. If the outdoor fan speed is further reduced, the overall energy consumption of the air conditioner will increase. Therefore, the reduction of the outdoor fan speed can be stopped, and the current outdoor fan speed can be taken as the optimal operating speed. The optimal operating speed obtained at this time can reduce the energy consumption of the outdoor fan as much as possible without affecting the heat exchange efficiency of the outdoor heat exchanger, thereby reducing the impact of the outdoor heat exchanger on the load of the fixed frequency compressor under heavy load.

[0047] Further reference Figure 3 As shown, the optimal operating speed of the outdoor fan is obtained by gradually reducing the operating speed until the increase in operating parameters exceeds a preset threshold, including:

[0048] S21, reduce the operating speed of the outdoor fan according to the preset step size, and obtain the current operating parameters after the outdoor fan is running stably.

[0049] Specifically, since the impact of the outdoor fan's operating speed on the load of the fixed-frequency compressor takes time to be reflected in the operating parameters, if the outdoor fan speed is controlled by a linear reduction method, real-time monitoring of the operating parameters may not reflect the true impact of the outdoor fan's operating speed on the load. Therefore, the outdoor fan's operating speed can be reduced by a preset step size, and the current operating parameters can be obtained after the outdoor fan is running stably. The operating parameters at this time can truly reflect the impact of the operating speed on the load, thereby improving the reliability of the method in this embodiment of the invention.

[0050] S22, if the difference between the current operating parameters and the operating parameters before the outdoor fan speed is gradually reduced is less than or equal to a preset threshold, return to the step of reducing the outdoor fan speed by a preset step size.

[0051] S23, if the difference between the current operating parameters and the operating parameters before the outdoor fan speed gradually decreases is greater than a preset threshold, the operating speed of the outdoor fan is increased by a preset step size to obtain the optimal operating speed.

[0052] Specifically, after reducing the outdoor fan's operating speed by a preset step size, if the difference between the current operating parameters and the operating parameters before the gradual reduction of the outdoor fan's operating speed is less than or equal to a preset threshold, it indicates that the reduced outdoor fan's operating speed still meets the outdoor heat exchanger's requirements for the outdoor fan's speed. Therefore, the process can return to S21 to continue reducing the outdoor fan's operating speed. If the difference between the current operating parameters and the operating parameters before the gradual reduction of the outdoor fan's operating speed is greater than a preset threshold, it indicates that the reduced outdoor fan's operating speed can no longer meet the outdoor heat exchanger's requirements for the outdoor fan's speed, leading to an increase in the load on the fixed-frequency compressor. In this case, the outdoor fan's operating speed can be increased by a preset step size to obtain the optimal operating speed, that is, the outdoor fan's operating speed before the reduction is taken as the optimal operating speed. This ensures that the optimal operating speed does not affect the heat exchange efficiency of the outdoor heat exchanger and minimizes the outdoor fan's energy consumption.

[0053] In some embodiments, optimizing the operating speed of the outdoor fan based on the operating parameters to obtain the optimal operating speed further includes: keeping the operating speed of the outdoor fan unchanged when the operating parameters are greater than or equal to a first operating parameter threshold and less than or equal to a second operating parameter threshold.

[0054] Specifically, when the operating parameters are greater than or equal to the first operating parameter threshold and less than or equal to the second operating parameter threshold, it indicates that the fixed-frequency compressor is operating in a steady state. Adjusting the outdoor fan speed may cause fluctuations in the fixed-frequency compressor, which is not conducive to the stable operation of the air conditioner. Therefore, the outdoor fan speed can be kept constant to ensure the stable operation of the air conditioner.

[0055] As a concrete example, see reference Figure 4 As shown, when the operating parameter is the operating current of a fixed-frequency compressor, the method of this embodiment of the invention may include:

[0056] S101: After the fixed-frequency compressor has been running stably, obtain the operating current of the fixed-frequency compressor and execute S102;

[0057] S102, determine the range of the working current. If the working current (IS) is greater than the second working current threshold (Imax), execute S103. If the working current is less than the first working current threshold (Imin), execute S104. If the working current is greater than or equal to the first working current threshold and less than or equal to the second working current threshold, execute S105.

[0058] S103, increase the operating speed of the outdoor fan to the first preset speed (Fmax), and execute S104;

[0059] S104, reduce the operating speed of the outdoor fan according to the preset step size, and execute S106;

[0060] S105, maintain the outdoor fan at the current operating speed, feedback S101;

[0061] S106: After the fixed-frequency compressor has been running stably, detect the operating current of the fixed-frequency compressor and execute S107.

[0062] S107, determine whether the increase in operating current (△IS) is greater than the preset threshold (IS1). If yes, execute S108; otherwise, return to S104.

[0063] S108, increase the operating speed of the outdoor fan by the preset step size, and return to S101.

[0064] It should be noted that other physical quantities can also be selected as control parameters in the method of this embodiment, such as the refrigerant outlet temperature of the outdoor heat exchanger, the temperature difference between the refrigerant outlet temperature and the outdoor ambient temperature, or the refrigerant outlet pressure of the outdoor heat exchanger. In this case, the control method of the outdoor fan is similar to the control method of the above embodiment, and will not be described in detail here.

[0065] In summary, the outdoor fan control method according to the embodiments of the present invention obtains the operating parameters such as the operating current of the fixed-frequency compressor in the air conditioner during the operation of the air conditioner, and optimizes the operating speed of the outdoor fan to obtain the optimal operating speed. This reduces the impact of the outdoor heat exchanger on the load of the fixed-frequency compressor under heavy load and improves the energy efficiency ratio of the air conditioner under light load, thereby effectively improving the working efficiency of the air conditioner.

[0066] Corresponding to the above embodiments, this embodiment of the invention also provides a computer-readable storage medium having a program stored thereon, which, when executed by a processor, implements the aforementioned method for controlling the outdoor fan of an air conditioner.

[0067] According to the computer-readable storage medium of the present invention, the aforementioned outdoor fan control method for an air conditioner can reduce the impact of the outdoor heat exchanger on the load of the fixed-frequency compressor under heavy load conditions and improve the energy efficiency ratio of the air conditioner under light load conditions, thereby effectively improving the working efficiency of the air conditioner.

[0068] Corresponding to the above embodiments, this invention also provides a controller, see reference. Figure 5As shown, the controller 200 includes: a memory 210, a processor 220, and a program stored in the memory 210 and executable on the processor 220. When the processor 220 executes the program, it implements the aforementioned method for controlling the outdoor fan of the air conditioner.

[0069] According to the controller of the present invention, the outdoor fan control method of the air conditioner described above can reduce the impact of the outdoor heat exchanger on the load of the fixed-frequency compressor under heavy load and improve the energy consumption ratio of the air conditioner under light load, thereby effectively improving the working efficiency of the air conditioner.

[0070] Corresponding to the above embodiments, this embodiment of the invention also provides an outdoor fan control device for an air conditioner, wherein, referring to Figure 1 As shown, the air conditioner 100 includes an outdoor fan 110, a fixed-frequency compressor 120, and an outdoor heat exchanger 130. (Refer to...) Figure 6 As shown, the device 300 includes an acquisition module 310 and a control module 320.

[0071] The acquisition module 310 is used to acquire the operating parameters of the air conditioner during its operation. These operating parameters include the operating current of the fixed-frequency compressor, the refrigerant outlet temperature of the outdoor heat exchanger, the temperature difference between the refrigerant outlet temperature and the outdoor ambient temperature, or the refrigerant outlet pressure of the outdoor heat exchanger. The control module 320 is used to optimize the operating speed of the outdoor fan based on the operating parameters to obtain the optimal operating speed, so as to reduce the impact of the outdoor heat exchanger on the load of the fixed-frequency compressor under heavy load and improve the energy efficiency ratio of the air conditioner under light load.

[0072] According to one embodiment of the present invention, the control module 320 is further configured to: when the operating parameters are less than a first operating parameter threshold, gradually reduce the operating speed of the outdoor fan until the increase in the operating parameters is greater than a preset threshold to obtain the optimal operating speed; when the operating parameters are greater than a second operating parameter threshold, first increase the operating speed of the outdoor fan to a first preset speed, and after the outdoor fan is running stably, gradually reduce the operating speed of the outdoor fan until the increase in the operating parameters is greater than the preset threshold to obtain the optimal operating speed; wherein, the second operating parameter threshold is greater than the first operating parameter threshold.

[0073] According to one embodiment of the present invention, the control module 320 is further configured to: reduce the operating speed of the outdoor fan by a preset step size, and after the outdoor fan is running stably, obtain the current operating parameters; if the difference between the current operating parameters and the operating parameters before the operating speed of the outdoor fan is gradually reduced is less than or equal to a preset threshold, return to the step of reducing the operating speed of the outdoor fan by a preset step size; if the difference between the current operating parameters and the operating parameters before the operating speed of the outdoor fan is gradually reduced is greater than the preset threshold, increase the operating speed of the outdoor fan by a preset step size to obtain the optimal operating speed.

[0074] According to one embodiment of the present invention, the first preset speed is the maximum allowable speed of the outdoor fan.

[0075] According to one embodiment of the present invention, the control module 320 is further configured to: maintain the operating speed of the outdoor fan unchanged when the operating parameters are greater than or equal to a first operating parameter threshold and less than or equal to a second operating parameter threshold.

[0076] According to one embodiment of the present invention, the outdoor fan is a DC fan.

[0077] It should be noted that for the description of the outdoor fan control device in the embodiments of the present invention, please refer to the foregoing description of the outdoor fan control device method, which will not be repeated here.

[0078] According to the outdoor fan control device of the present invention, during the operation of the air conditioner, the acquisition module obtains the operating parameters such as the operating current of the fixed-frequency compressor in the air conditioner, and the control module optimizes the operating speed of the outdoor fan based on the operating parameters to obtain the optimal operating speed. This reduces the impact of the outdoor heat exchanger on the load of the fixed-frequency compressor under heavy load and improves the energy efficiency ratio of the air conditioner under light load, thereby effectively improving the working efficiency of the air conditioner.

[0079] Corresponding to the above embodiments, this invention also provides an air conditioner, see reference. Figure 7a or Figure 7b As shown, the air conditioner 1000 includes the aforementioned controller 200 or the aforementioned outdoor fan control device 300.

[0080] According to the embodiments of the present invention, the air conditioner can reduce the impact of the outdoor heat exchanger on the load of the fixed-frequency compressor under heavy load conditions and improve the energy efficiency ratio of the air conditioner under light load conditions by means of the aforementioned controller or the aforementioned outdoor fan control device, thereby effectively improving the working efficiency of the air conditioner.

[0081] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0082] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0083] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0084] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0085] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0086] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for controlling the outdoor fan of an air conditioner, characterized in that, The air conditioner includes the outdoor fan, the fixed-frequency compressor, and the outdoor heat exchanger; the method includes: During the operation of the air conditioner, the operating parameters of the air conditioner are acquired; wherein, the operating parameters include the operating current of the fixed-frequency compressor, the refrigerant outlet temperature of the outdoor heat exchanger, the temperature difference between the refrigerant outlet temperature and the outdoor ambient temperature, or the refrigerant outlet pressure of the outdoor heat exchanger. The optimal operating speed of the outdoor fan is obtained by optimizing the operating parameters to reduce the impact of the outdoor heat exchanger on the load of the fixed-frequency compressor under heavy load and to improve the energy efficiency ratio of the air conditioner under light load.

2. The method according to claim 1, characterized in that, The process of optimizing the operating speed of the outdoor fan based on the operating parameters to obtain the optimal operating speed includes: When the operating parameters are less than the first operating parameter threshold, the operating speed of the outdoor fan is gradually reduced until the increase in the operating parameters is greater than the preset threshold to obtain the optimal operating speed. When the operating parameter is greater than the second operating parameter threshold, the operating speed of the outdoor fan is first increased to the first preset speed, and after the outdoor fan is running stably, the operating speed of the outdoor fan is gradually reduced until the increase in the operating parameter is greater than the preset threshold to obtain the optimal operating speed; wherein, the second operating parameter threshold is greater than the first operating parameter threshold.

3. The method according to claim 2, characterized in that, The step of gradually reducing the operating speed of the outdoor fan until the increase in the operating parameters exceeds a preset threshold to obtain the optimal operating speed includes: The operating speed of the outdoor fan is reduced by a preset step size, and the current operating parameters are obtained after the outdoor fan is running stably. If the difference between the current operating parameters and the operating parameters before the operating speed of the outdoor fan is gradually reduced is less than or equal to the preset threshold, return to the step of reducing the operating speed of the outdoor fan by a preset step size; If the difference between the current operating parameters and the operating parameters before the operating speed of the outdoor fan gradually decreases is greater than the preset threshold, the operating speed of the outdoor fan is increased by the preset step size to obtain the optimal operating speed.

4. The method according to claim 2, characterized in that, The first preset speed is the maximum allowable speed of the outdoor fan.

5. The method according to claim 2, characterized in that, The step of optimizing the operating speed of the outdoor fan based on the operating parameters to obtain the optimal operating speed further includes: When the operating parameter is greater than or equal to the first operating parameter threshold and less than or equal to the second operating parameter threshold, the operating speed of the outdoor fan remains unchanged.

6. The method according to any one of claims 1-5, characterized in that, The outdoor fan is a DC fan.

7. A computer-readable storage medium, characterized in that, It stores a program that, when executed by a processor, implements the outdoor fan control method of an air conditioner according to any one of claims 1-6.

8. A controller, characterized in that, include: The device includes a memory, a processor, and a program stored in the memory and executable on the processor, wherein when the processor executes the program, it implements the outdoor fan control method for an air conditioner according to any one of claims 1-6.

9. An outdoor fan control device for an air conditioner, characterized in that, The air conditioner includes the outdoor fan, the fixed-frequency compressor, and the outdoor heat exchanger; the device includes: The acquisition module is used to acquire the operating parameters of the air conditioner during the operation of the air conditioner; wherein, the operating parameters include the operating current of the fixed frequency compressor, the refrigerant outlet temperature of the outdoor heat exchanger, the temperature difference between the refrigerant outlet temperature and the outdoor ambient temperature, or the refrigerant outlet pressure of the outdoor heat exchanger. The control module is used to optimize the operating speed of the outdoor fan based on the operating parameters to obtain the optimal operating speed, so as to reduce the impact of the outdoor heat exchanger on the load of the fixed-frequency compressor under heavy load and improve the energy efficiency ratio of the air conditioner under light load.

10. An air conditioner, characterized in that, Includes the controller according to claim 8, or the outdoor fan control device for an air conditioner according to claim 9.

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