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

Abstract

The application discloses an air conditioner and a control method, device, controller and storage medium thereof, wherein the method comprises the following steps: determining an indoor temperature, an outdoor temperature and a set temperature, and determining a running frequency and a working current of a compressor; determining a maximum limit frequency of the compressor according to the outdoor temperature, and determining an absolute value of a temperature difference between the indoor temperature and the set temperature when the running frequency of the compressor reaches the maximum limit frequency; if the working current of the compressor is less than a preset maximum current threshold value when the absolute value of the temperature difference is greater than a preset temperature threshold value, increasing the maximum limit frequency, so as to control the compressor according to the increased maximum limit power. Therefore, the maximum running frequency of the compressor can be increased as much as possible under the premise of meeting reliability, the refrigeration and heating effects of the air conditioner are improved, and the use experience of users is remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and in particular to an air conditioner, an air conditioner control method, an air conditioner control device, a controller, and a computer-readable storage medium. Background Technology

[0002] In the use of inverter air conditioners, the output cooling or heating capacity of the air conditioner is mainly adjusted by adjusting the operating frequency of its compressor in order to meet the cooling or heating load requirements of the room.

[0003] In related technologies, the maximum operating frequency of an air conditioner is generally determined based on outdoor ambient temperature ranges. The sensor responsible for detecting the outdoor ambient temperature is typically fixed on the windward side of the outdoor heat exchanger. Due to different installation orientations of the outdoor unit, there may be instances where the outdoor ambient temperature sensor is exposed to sunlight for extended periods in winter, resulting in a higher sampled ambient temperature, or instances where the sensor is not exposed to sunlight for extended periods in summer, resulting in a lower sampled ambient temperature. In these situations, the maximum operating frequency of the air conditioner is lower than expected, leading to poorer cooling or heating performance and resulting in user complaints. Summary of the Invention

[0004] 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 provide a control method for an air conditioner that, while maintaining reliability, maximizes the maximum operating frequency of the compressor, improves the cooling and heating performance of the air conditioner, and significantly enhances the user experience.

[0005] The second objective of this invention is to provide a control device for an air conditioner.

[0006] The third objective of this invention is to provide an air conditioner.

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

[0008] The fifth objective of this invention is to provide a computer-readable storage medium.

[0009] To achieve the above objectives, a first aspect of the present invention provides a control method for an air conditioner, comprising: determining an indoor temperature, an outdoor temperature, and a set temperature, and determining the operating frequency and operating current of a compressor; determining the maximum limiting frequency of the compressor based on the outdoor temperature, and determining the absolute value of the temperature difference between the indoor temperature and the set temperature when the operating frequency of the compressor reaches the maximum limiting frequency; and increasing the maximum limiting frequency if the operating current of the compressor is less than a preset maximum current threshold when the absolute value of the temperature difference is greater than a preset temperature threshold, so as to control the compressor based on the increased maximum limiting power.

[0010] According to the air conditioner control method of the present invention, the indoor temperature, outdoor temperature, and set temperature are determined, as well as the compressor's operating frequency and operating current. The maximum limiting frequency of the compressor is determined based on the outdoor temperature. When the compressor's operating frequency reaches the maximum limiting frequency, the absolute value of the temperature difference between the indoor temperature and the set temperature is determined. Furthermore, if the compressor's operating current is less than a preset maximum current threshold when the absolute value of the temperature difference is greater than a preset temperature threshold, the maximum limiting frequency is increased. This allows the compressor to be controlled based on the increased maximum limiting power. Therefore, while maintaining reliability, the maximum operating frequency of the compressor can be maximized, improving the air conditioner's cooling and heating performance and significantly enhancing the user experience.

[0011] According to one embodiment of the present invention, increasing the maximum limiting frequency includes: gradually increasing the maximum limiting frequency step by step according to a preset step size until the maximum limiting frequency reaches the maximum allowable operating frequency of the compressor.

[0012] According to one embodiment of the present invention, when the operating frequency of the compressor reaches the maximum limiting frequency, the method further includes: starting a timer so as to determine the relationship between the absolute value of the temperature difference and the preset temperature threshold when the timer reaches a preset time.

[0013] According to one embodiment of the present invention, when the absolute value of the temperature difference is less than or equal to a preset temperature threshold, the method further includes: controlling the compressor to maintain the current operating frequency.

[0014] According to one embodiment of the present invention, when the absolute value of the temperature difference is greater than a preset temperature threshold, the method further includes: if the operating current of the compressor is greater than or equal to a preset maximum current threshold, then controlling the compressor to maintain the maximum limiting frequency.

[0015] According to one embodiment of the present invention, determining the maximum limiting frequency of the compressor based on the outdoor temperature includes: determining the temperature range in which the outdoor temperature falls, wherein different temperature ranges correspond to different maximum limiting frequencies of the compressor; and determining the maximum limiting frequency based on the temperature range in which the outdoor temperature falls.

[0016] To achieve the above objectives, a second aspect of the present invention provides a control device for an air conditioner, comprising: a first determining module for determining an indoor temperature, an outdoor temperature, and a set temperature; a second determining module for determining the operating frequency and operating current of a compressor; and a control module for determining the maximum limiting frequency of the compressor based on the outdoor temperature, and determining the absolute value of the temperature difference between the indoor temperature and the set temperature when the operating frequency of the compressor reaches the maximum limiting frequency, and increasing the maximum limiting frequency if the operating current of the compressor is less than a preset maximum current threshold when the absolute value of the temperature difference is greater than a preset temperature threshold, so as to control the compressor based on the increased maximum limiting power.

[0017] According to an embodiment of the present invention, the control device for an air conditioner determines the indoor temperature, outdoor temperature, and set temperature through a first determining module, and determines the compressor's operating frequency and operating current through a second determining module. A control module determines the compressor's maximum limiting frequency based on the outdoor temperature. When the compressor's operating frequency reaches the maximum limiting frequency, the absolute value of the temperature difference between the indoor temperature and the set temperature is determined. If the absolute value of the temperature difference is greater than a preset temperature threshold, and the compressor's operating current is less than a preset maximum current threshold, the maximum limiting frequency is increased to control the compressor based on the increased maximum limiting power. Therefore, while maintaining reliability, the maximum operating frequency of the compressor can be maximized, improving the air conditioner's cooling and heating performance and significantly enhancing the user experience.

[0018] To achieve the above objectives, a third aspect of the present invention provides an air conditioner, comprising: a compressor, an indoor heat exchanger, an outdoor heat exchanger, and a throttling element; a first temperature detector for detecting indoor temperature; a second temperature detector for detecting outdoor temperature; a current detection unit for detecting the operating current of the compressor; a frequency detection unit for detecting the operating frequency of the compressor; and a controller for determining the maximum limiting frequency of the compressor based on the outdoor temperature, and determining the absolute value of the temperature difference between the indoor temperature and a set temperature when the operating frequency of the compressor reaches the maximum limiting frequency, and increasing the maximum limiting frequency if the operating current of the compressor is less than a preset maximum current threshold when the absolute value of the temperature difference is greater than a preset temperature threshold, so as to control the compressor according to the increased maximum limiting power.

[0019] An air conditioner according to an embodiment of the present invention comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger, and a throttling element. It detects the indoor temperature using a first temperature detector and the outdoor temperature using a second temperature detector. It also detects the compressor's operating current using a current detection unit and the compressor's operating frequency using a frequency detection unit. A controller determines the compressor's maximum limiting frequency based on the outdoor temperature. When the compressor's operating frequency reaches the maximum limiting frequency, it determines the absolute value of the temperature difference between the indoor temperature and the set temperature. If the absolute value of the temperature difference is greater than a preset temperature threshold, and the compressor's operating current is less than a preset maximum current threshold, the maximum limiting frequency is increased to control the compressor based on the increased maximum limiting power. Therefore, while maintaining reliability, the maximum operating frequency of the compressor can be maximized, improving the air conditioner's cooling and heating performance and significantly enhancing the user experience.

[0020] To achieve the above objectives, a fourth aspect of the present invention provides an air conditioner controller, including a memory, a processor, and an air conditioner control program stored in the memory and executable on the processor. When the processor executes the air conditioner control program, it implements the above-described air conditioner control method.

[0021] According to an embodiment of the present invention, an air conditioner controller determines the indoor temperature, outdoor temperature, and set temperature, as well as the compressor's operating frequency and operating current. It determines the compressor's maximum limiting frequency based on the outdoor temperature, and when the compressor's operating frequency reaches the maximum limiting frequency, it determines the absolute value of the temperature difference between the indoor temperature and the set temperature. Furthermore, if the compressor's operating current is less than a preset maximum current threshold when the absolute value of the temperature difference is greater than a preset temperature threshold, the controller increases the maximum limiting frequency to control the compressor based on the increased maximum limiting power. Therefore, while maintaining reliability, the maximum operating frequency of the compressor can be maximized, improving the air conditioner's cooling and heating performance and significantly enhancing the user experience.

[0022] To achieve the above objectives, a fifth aspect of the present invention provides a computer-readable storage medium storing a control program for an air conditioner, which, when executed by a processor, implements the above-described control method for the air conditioner.

[0023] According to embodiments of the present invention, a computer-readable storage medium determines an indoor temperature, an outdoor temperature, and a set temperature, as well as the operating frequency and operating current of a compressor. It determines the maximum limiting frequency of the compressor based on the outdoor temperature, and when the compressor's operating frequency reaches the maximum limiting frequency, it determines the absolute value of the temperature difference between the indoor temperature and the set temperature. Furthermore, if the compressor's operating current is less than a preset maximum current threshold when the absolute value of the temperature difference is greater than a preset temperature threshold, the maximum limiting frequency is increased to control the compressor based on the increased maximum limiting power. Therefore, while maintaining reliability, the maximum operating frequency of the compressor can be maximized, improving the cooling and heating performance of the air conditioner and significantly enhancing the user experience.

[0024] 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

[0025] Figure 1 A flowchart of an air conditioner control method according to an embodiment of the present invention;

[0026] Figure 2 A flowchart of a control method for an air conditioner according to another embodiment of the present invention;

[0027] Figure 3 This is a structural block diagram of a control device for an air conditioner according to an embodiment of the present invention;

[0028] Figure 4 This is a structural block diagram of an air conditioner according to an embodiment of the present invention;

[0029] Figure 5 This is a structural block diagram of an air conditioner controller according to an embodiment of the present invention. Detailed Implementation

[0030] 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.

[0031] The following description, with reference to the accompanying drawings, describes an air conditioner and its control method, apparatus, controller, and storage medium provided in embodiments of the present invention.

[0032] Figure 1 A flowchart of an air conditioner control method according to an embodiment of the present invention is provided, with reference to... Figure 1 As shown, the control method for this air conditioner may include the following steps:

[0033] Step S101: Determine the indoor temperature, outdoor temperature, and set temperature, and determine the compressor's operating frequency and operating current.

[0034] Specifically, after the air conditioner enters cooling or heating mode, it controls the compressor to start and collects indoor temperature, outdoor temperature, set temperature, compressor operating frequency, and operating current to provide data for subsequent air conditioner control. The indoor temperature is the current actual indoor temperature; the set temperature is the indoor temperature set by the user to be achieved by the air conditioner; the outdoor temperature is the current outdoor ambient temperature; the compressor operating frequency is the compressor's operating frequency when the air conditioner controls the indoor temperature; and the compressor operating current is the compressor's operating current at the current operating frequency.

[0035] Step S102: Determine the maximum limiting frequency of the compressor based on the outdoor temperature, and when the compressor's operating frequency reaches the maximum limiting frequency, determine the absolute value of the temperature difference between the indoor temperature and the set temperature.

[0036] Determining the compressor's maximum limiting frequency based on the outdoor temperature may include: determining the temperature range in which the outdoor temperature falls, where different temperature ranges correspond to different maximum limiting frequencies of the compressor; and determining the maximum limiting frequency based on the temperature range in which the outdoor temperature falls.

[0037] In other words, the compressor's maximum limiting frequency can depend on the outdoor ambient temperature. Specifically, when determining the compressor's maximum limiting frequency, different temperature ranges can be set to correspond to different maximum limiting frequencies for the compressor. Then, the current outdoor temperature range can be determined, and the maximum limiting frequency can be determined based on this temperature range. During operation, when it is determined that the compressor's operating frequency has reached the maximum limiting frequency, the absolute value of the temperature difference between the indoor temperature and the set temperature is obtained to determine whether the air conditioner's output cooling or heating capacity can meet the indoor load demand.

[0038] In one embodiment, when the compressor's operating frequency reaches the maximum limit frequency, the method further includes: starting a timer so that when the timer reaches a preset time, the relationship between the absolute value of the temperature difference and a preset temperature threshold can be determined.

[0039] In other words, in practical implementation, the relationship between the absolute value of the temperature difference and the preset temperature threshold can be determined at a preset time after the compressor's operating frequency reaches the maximum limit frequency. This allows the air conditioner to operate stably for a period of time after reaching the maximum limit frequency, thereby making the indoor temperature more stable. This makes subsequent judgments more accurate and helps improve control precision.

[0040] It is understood that the aforementioned preset time can be a first preset fixed value, or a first preset variable value calculated based on multiple related variables. In a specific example, this first preset variable value can be obtained in the following way:

[0041] TIME1 = a1*T1 + a2*T4 + a3*FT4

[0042] Where TIME1 is the first preset variable value, T1 is the indoor temperature, T4 is the outdoor temperature, FT4 is the compressor operating frequency, and a1, a2, and a3 are constants.

[0043] Step S103: When the absolute value of the temperature difference is greater than the preset temperature threshold, if the operating current of the compressor is less than the preset maximum current threshold, the maximum limiting frequency is increased so as to control the compressor according to the increased maximum limiting power.

[0044] In other words, if the absolute value of the temperature difference is greater than the preset temperature threshold, it means that the corresponding air conditioner's cooling or heating capacity cannot meet the indoor load demand. At this point, if the compressor's operating current is less than the preset maximum current threshold, it indicates that the compressor's operating frequency can be further increased. Therefore, in this situation, the maximum limiting frequency is increased within a range below the maximum allowable operating frequency, and the compressor is controlled according to the increased maximum limiting power. This aims to maximize the compressor's maximum operating frequency while maintaining reliability, thereby improving the air conditioner's cooling and heating performance and enhancing the user experience.

[0045] Understandably, when the absolute value of the temperature difference is greater than the preset temperature threshold and the compressor's operating current is less than the preset maximum current threshold, the air conditioner's cooling or heating effect can be improved either by directly increasing the maximum limiting frequency or by correcting the outdoor temperature to change the compressor's maximum limiting power.

[0046] In one embodiment, increasing the maximum limiting frequency includes: gradually increasing the maximum limiting frequency in preset steps until the maximum limiting frequency reaches the compressor's maximum allowable operating frequency.

[0047] Specifically, under the premise that the absolute value of the temperature difference is greater than a preset temperature threshold and the compressor's operating current is less than a preset maximum current threshold, when increasing the maximum limiting frequency, the maximum limiting frequency can be increased step by step according to a preset step size, and the maximum value of the maximum limiting frequency does not exceed the compressor's maximum allowable operating frequency. It is understood that the present invention is not limited to this method of increasing the maximum limiting frequency; it can also be increased according to a second preset fixed value, or it can be increased based on a second preset variable value calculated from multiple related variables. In a specific example, the second preset variable value can be obtained in the following way:

[0048] deltaF=b1*T1+b2*T4+b3*FT4

[0049] Where deltaF is the second preset variable value, T1 is the indoor temperature, T4 is the outdoor temperature, FT4 is the compressor operating frequency, and b1, b2, and b3 are constants.

[0050] According to the air conditioner control method of the present invention, the indoor temperature, outdoor temperature, and set temperature are determined, as well as the compressor's operating frequency and operating current. The maximum limiting frequency of the compressor is determined based on the outdoor temperature. When the compressor's operating frequency reaches the maximum limiting frequency, the absolute value of the temperature difference between the indoor temperature and the set temperature is determined. Furthermore, if the compressor's operating current is less than a preset maximum current threshold when the absolute value of the temperature difference is greater than a preset temperature threshold, the maximum limiting frequency is increased. This allows the compressor to be controlled based on the increased maximum limiting power. Therefore, while maintaining reliability, the maximum operating frequency of the compressor can be maximized, improving the air conditioner's cooling and heating performance and significantly enhancing the user experience.

[0051] In one embodiment, when the absolute value of the temperature difference is less than or equal to a preset temperature threshold, the method further includes: controlling the compressor to maintain its current operating frequency.

[0052] In other words, if the absolute value of the temperature difference is less than or equal to the preset temperature threshold, it means that the indoor temperature is close enough to the set temperature, and the corresponding air conditioner outputs cooling or heating capacity to basically meet the indoor load demand. At this time, the compressor can be controlled to maintain the current operating frequency without further adjustment.

[0053] In one embodiment, when the absolute value of the temperature difference is greater than a preset temperature threshold, the method further includes: if the operating current of the compressor is greater than or equal to a preset maximum current threshold, then controlling the compressor to operate at the maximum limited frequency.

[0054] Specifically, when the absolute value of the temperature difference is greater than the preset temperature threshold, it means that the corresponding air conditioner's output cooling or heating capacity cannot meet the indoor load demand. However, if the compressor's operating current is greater than or equal to the preset maximum current threshold, it means that the compressor's operating current has reached its upper limit. Therefore, the compressor is controlled to remain unchanged and operate at the maximum limited frequency.

[0055] The present invention will be further explained and illustrated below through a specific embodiment. Figure 2 Here is a flowchart of the control method for an air conditioner according to this embodiment, with reference to... Figure 2 As shown, the control method for this air conditioner may include the following steps:

[0056] Step S201: The air conditioner enters cooling or heating mode and controls the compressor to start.

[0057] Step S202: Obtain indoor temperature, outdoor temperature, set temperature, compressor operating frequency, and operating current.

[0058] Step S203: Start timing when the compressor's operating frequency reaches the maximum limit frequency.

[0059] Step S204: When the preset time is reached, determine whether the difference between the indoor temperature and the set temperature is greater than the preset temperature threshold. If yes, proceed to step S205; otherwise, proceed to step S206.

[0060] Step S205: Determine whether the compressor's operating current is less than the preset maximum current threshold. If yes, proceed to step S207; otherwise, proceed to step S206.

[0061] Step S206: Maintain the current frequency control scheme.

[0062] Step S207: Increase the maximum limit frequency within a range below the maximum allowable operating frequency to meet room load requirements.

[0063] It should be understood that, although Figure 1 and 2 The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order in which these steps are executed, and they can be performed in other orders. Furthermore, Figure 1 and 2At least some of the steps in the process 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 executed in turn or alternately with other steps or at least some of the sub-steps or stages of other steps.

[0064] In summary, the air conditioner control method according to embodiments of the present invention determines the indoor temperature, outdoor temperature, and set temperature, as well as the compressor's operating frequency and operating current. It determines the compressor's maximum limiting frequency based on the outdoor temperature, and when the compressor's operating frequency reaches the maximum limiting frequency, determines the absolute value of the temperature difference between the indoor temperature and the set temperature. Furthermore, if the compressor's operating current is less than a preset maximum current threshold when the absolute value of the temperature difference is greater than a preset temperature threshold, the maximum limiting frequency is increased to control the compressor based on the increased maximum limiting power. Therefore, while maintaining reliability, the maximum operating frequency of the compressor can be maximized, improving the air conditioner's cooling and heating performance and significantly enhancing the user experience.

[0065] Figure 3 This is a structural block diagram of a control device for an air conditioner according to an embodiment of the present invention. (Reference) Figure 3 As shown, the control device 300 of the air conditioner may include: a first determining module 301, a second determining module 302 and a control module 303.

[0066] The first determining module 301 is used to determine the indoor temperature, outdoor temperature, and set temperature; the second determining module 302 is used to determine the compressor's operating frequency and operating current; the control module 303 is used to determine the compressor's maximum limiting frequency based on the outdoor temperature, and when the compressor's operating frequency reaches the maximum limiting frequency, determine the absolute value of the temperature difference between the indoor temperature and the set temperature, and when the absolute value of the temperature difference is greater than a preset temperature threshold, if the compressor's operating current is less than a preset maximum current threshold, increase the maximum limiting frequency so as to control the compressor based on the increased maximum limiting power.

[0067] In one embodiment, the control module 303 is specifically used to: gradually increase the maximum limiting frequency according to a preset step size until the maximum limiting frequency reaches the compressor's maximum allowable operating frequency.

[0068] In one embodiment, the control module 303 is further configured to: start timing when the compressor's operating frequency reaches the maximum limit frequency, so as to determine the relationship between the absolute value of the temperature difference and the preset temperature threshold when the timing time reaches the preset time.

[0069] In one embodiment, the control module 303 is further configured to: control the compressor to maintain its current operating frequency when the absolute value of the temperature difference is less than or equal to a preset temperature threshold.

[0070] In one embodiment, the control module 303 is further configured to: when the absolute value of the temperature difference is greater than a preset temperature threshold, if the operating current of the compressor is greater than or equal to a preset maximum current threshold, control the compressor to maintain the maximum limited frequency operation.

[0071] In one embodiment, the control module 303 is specifically used to: determine the temperature range of the outdoor temperature, wherein different temperature ranges correspond to different maximum limiting frequencies of the compressor; and determine the maximum limiting frequency based on the temperature range of the outdoor temperature.

[0072] It should be noted that for the description of the control device for the air conditioner in this application, please refer to the description of the control method for the air conditioner in this application, and will not be repeated here.

[0073] According to an embodiment of the present invention, the control device for an air conditioner determines the indoor temperature, outdoor temperature, and set temperature through a first determining module, and determines the compressor's operating frequency and operating current through a second determining module. A control module determines the compressor's maximum limiting frequency based on the outdoor temperature. When the compressor's operating frequency reaches the maximum limiting frequency, the absolute value of the temperature difference between the indoor temperature and the set temperature is determined. If the absolute value of the temperature difference is greater than a preset temperature threshold, and the compressor's operating current is less than a preset maximum current threshold, the maximum limiting frequency is increased to control the compressor based on the increased maximum limiting power. Therefore, while maintaining reliability, the maximum operating frequency of the compressor can be maximized, improving the air conditioner's cooling and heating performance and significantly enhancing the user experience.

[0074] Figure 4 This is a structural block diagram of an air conditioner according to an embodiment of the present invention. (Reference) Figure 4 As shown, the air conditioner 400 includes: a compressor 401, an indoor heat exchanger 402, an outdoor heat exchanger 403, a throttling element 404, a first temperature detector 405, a second temperature detector 406, a current detection unit 407, a frequency detection unit 408, and a controller 409.

[0075] The system includes a first temperature detector 405 for detecting indoor temperature, a second temperature detector 406 for detecting outdoor temperature, a current detection unit 407 for detecting the operating current of the compressor 401, a frequency detection unit 408 for detecting the operating frequency of the compressor 401, and a controller 409 for determining the maximum limiting frequency of the compressor 401 based on the outdoor temperature. When the operating frequency of the compressor 401 reaches the maximum limiting frequency, the controller determines the absolute value of the temperature difference between the indoor temperature and the set temperature. Furthermore, if the absolute value of the temperature difference is greater than a preset temperature threshold, and the operating current of the compressor 401 is less than a preset maximum current threshold, the controller increases the maximum limiting frequency to control the compressor 401 based on the increased maximum limiting power.

[0076] In one embodiment, the controller 409 is specifically configured to: gradually increase the maximum limiting frequency according to a preset step size until the maximum limiting frequency reaches the maximum allowable operating frequency of the compressor 401.

[0077] In one embodiment, the controller 409 is further configured to: start timing when the operating frequency of the compressor 401 reaches the maximum limit frequency, so as to determine the relationship between the absolute value of the temperature difference and the preset temperature threshold when the timing time reaches the preset time.

[0078] In one embodiment, the controller 409 is further configured to: control the compressor 401 to maintain its current operating frequency when the absolute value of the temperature difference is less than or equal to a preset temperature threshold.

[0079] In one embodiment, the controller 409 is further configured to: when the absolute value of the temperature difference is greater than a preset temperature threshold, if the operating current of the compressor 401 is greater than or equal to a preset maximum current threshold, control the compressor 401 to maintain the maximum limited frequency operation.

[0080] In one embodiment, the controller 409 is specifically configured to: determine the temperature range in which the outdoor temperature is located, wherein different temperature ranges correspond to different maximum limiting frequencies of the compressor 401; and determine the maximum limiting frequency based on the temperature range in which the outdoor temperature is located.

[0081] It should be noted that for the description of the air conditioner in this application, please refer to the description of the control method of the air conditioner in this application, which will not be repeated here.

[0082] An air conditioner according to an embodiment of the present invention comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger, and a throttling element. It detects the indoor temperature using a first temperature detector and the outdoor temperature using a second temperature detector. It also detects the compressor's operating current using a current detection unit and the compressor's operating frequency using a frequency detection unit. A controller determines the compressor's maximum limiting frequency based on the outdoor temperature. When the compressor's operating frequency reaches the maximum limiting frequency, it determines the absolute value of the temperature difference between the indoor temperature and the set temperature. If the absolute value of the temperature difference is greater than a preset temperature threshold, and the compressor's operating current is less than a preset maximum current threshold, the maximum limiting frequency is increased to control the compressor based on the increased maximum limiting power. Therefore, while maintaining reliability, the maximum operating frequency of the compressor can be maximized, improving the air conditioner's cooling and heating performance and significantly enhancing the user experience.

[0083] Figure 5 This is a structural block diagram of an air conditioner controller according to an embodiment of the present invention. (Reference) Figure 5 As shown, the air conditioner controller 500 includes a memory 501, a processor 502, and an air conditioner control program stored in the memory 501 and executable on the processor 502. When the processor 502 executes the air conditioner control program, it implements the aforementioned air conditioner control method.

[0084] According to an embodiment of the present invention, an air conditioner controller determines the indoor temperature, outdoor temperature, and set temperature, as well as the compressor's operating frequency and operating current. It determines the compressor's maximum limiting frequency based on the outdoor temperature, and when the compressor's operating frequency reaches the maximum limiting frequency, it determines the absolute value of the temperature difference between the indoor temperature and the set temperature. Furthermore, if the compressor's operating current is less than a preset maximum current threshold when the absolute value of the temperature difference is greater than a preset temperature threshold, the controller increases the maximum limiting frequency to control the compressor based on the increased maximum limiting power. Therefore, while maintaining reliability, the maximum operating frequency of the compressor can be maximized, improving the air conditioner's cooling and heating performance and significantly enhancing the user experience.

[0085] In one embodiment, a computer-readable storage medium is provided on which an air conditioner control program is stored, which, when executed by a processor, implements the above-described air conditioner control method.

[0086] According to embodiments of the present invention, a computer-readable storage medium determines an indoor temperature, an outdoor temperature, and a set temperature, as well as the operating frequency and operating current of a compressor. It determines the maximum limiting frequency of the compressor based on the outdoor temperature, and when the compressor's operating frequency reaches the maximum limiting frequency, it determines the absolute value of the temperature difference between the indoor temperature and the set temperature. Furthermore, if the compressor's operating current is less than a preset maximum current threshold when the absolute value of the temperature difference is greater than a preset temperature threshold, the maximum limiting frequency is increased to control the compressor based on the increased maximum limiting power. Therefore, while maintaining reliability, the maximum operating frequency of the compressor can be maximized, improving the cooling and heating performance of the air conditioner and significantly enhancing the user experience.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] 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 control method for an air conditioner, characterized in that, include: Determine the indoor temperature, outdoor temperature, and set temperature, and determine the compressor's operating frequency and operating current; The maximum limiting frequency of the compressor is determined based on the outdoor temperature, and when the operating frequency of the compressor reaches the maximum limiting frequency, the absolute value of the temperature difference between the indoor temperature and the set temperature is determined. When the absolute value of the temperature difference is greater than a preset temperature threshold, if the operating current of the compressor is less than a preset maximum current threshold, the maximum limiting frequency is increased so that the compressor can be controlled according to the increased maximum limiting frequency.

2. The method according to claim 1, characterized in that, Increasing the maximum limit frequency includes: The maximum limiting frequency is increased step by step according to a preset step size until the maximum limiting frequency reaches the maximum allowable operating frequency of the compressor.

3. The method according to claim 1 or 2, characterized in that, When the operating frequency of the compressor reaches the maximum limiting frequency, the method further includes: Start timing so that when the timing reaches a preset time, the relationship between the absolute value of the temperature difference and the preset temperature threshold can be determined.

4. The method according to claim 3, characterized in that, When the absolute value of the temperature difference is less than or equal to a preset temperature threshold, the method further includes: The compressor is controlled to maintain its current operating frequency.

5. The method according to claim 3, characterized in that, When the absolute value of the temperature difference is greater than a preset temperature threshold, the method further includes: If the operating current of the compressor is greater than or equal to the preset maximum current threshold, the compressor is controlled to maintain the maximum limited frequency.

6. The method according to claim 1, characterized in that, Determining the maximum limiting frequency of the compressor based on the outdoor temperature includes: The temperature range of the outdoor temperature is determined, wherein different temperature ranges correspond to different maximum limiting frequencies of the compressor; The maximum limiting frequency is determined based on the temperature range in which the outdoor temperature falls.

7. A control device for an air conditioner, characterized in that, include: The first determining module is used to determine the indoor temperature, outdoor temperature, and set temperature; The second determining module is used to determine the compressor's operating frequency and operating current; The control module is used to determine the maximum limiting frequency of the compressor based on the outdoor temperature, and when the operating frequency of the compressor reaches the maximum limiting frequency, determine the absolute value of the temperature difference between the indoor temperature and the set temperature, and when the absolute value of the temperature difference is greater than a preset temperature threshold, if the operating current of the compressor is less than a preset maximum current threshold, increase the maximum limiting frequency so as to control the compressor based on the increased maximum limiting frequency.

8. An air conditioner, characterized in that, include: Compressor, indoor heat exchanger, outdoor heat exchanger, and throttling element; The first temperature detector is used to detect the indoor temperature; The second temperature sensor is used to detect the outdoor temperature; A current detection unit is used to detect the operating current of the compressor; A frequency detection unit is used to detect the operating frequency of the compressor; The controller is configured to determine the maximum limiting frequency of the compressor based on the outdoor temperature, and when the operating frequency of the compressor reaches the maximum limiting frequency, determine the absolute value of the temperature difference between the indoor temperature and the set temperature, and when the absolute value of the temperature difference is greater than a preset temperature threshold, if the operating current of the compressor is less than a preset maximum current threshold, increase the maximum limiting frequency so as to control the compressor based on the increased maximum limiting frequency.

9. An air conditioner controller, characterized in that, The device includes a memory, a processor, and a control program for an air conditioner stored in the memory and executable on the processor. When the processor executes the control program for the air conditioner, it implements the control method for the air conditioner according to any one of claims 1-6.

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

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