Air conditioners and their control methods, devices and media

Abstract

This invention discloses an air conditioner and its control method, device, and medium. The air conditioner includes a compressor, an indoor heat exchanger, and an indoor fan. The method includes: when the outdoor ambient temperature is determined to be lower than an ambient temperature threshold, controlling the air conditioner to enter a heating compensation mode; after the air conditioner enters the heating compensation mode, acquiring the initial frequency of the compressor; controlling the compressor to operate according to the initial frequency and acquiring the operating current of the air conditioner; and performing frequency boosting on the compressor based on the operating current. This ensures that the air conditioner will not shut down due to excessive current during the initial startup of the heating mode, while also fully utilizing the overall power of the unit to achieve rapid heating.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and in particular to an air conditioner and its control method, device and medium. Background Technology

[0002] When an air conditioner is running in heating mode, the compressor's operating frequency has different upper limits depending on the outdoor ambient temperature. However, if the upper limit is set too low, the power will be too low, and the heating speed will be slow in the initial stage of operation; if the upper limit is set too high, excessive current may occur in the initial stage of operation, triggering the shutdown protection. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in the related art. Therefore, the first objective of this invention is to provide a control method for an air conditioner that ensures it will not shut down due to excessive current during the initial startup of heating mode, while also fully utilizing the overall power of the unit to achieve rapid heating.

[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 an air conditioner.

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

[0007] To achieve the above objectives, a first aspect of the present invention provides a control method for an air conditioner, the air conditioner including a compressor, an indoor heat exchanger, and an indoor fan. The method includes: when the outdoor ambient temperature is determined to be lower than an ambient temperature threshold, controlling the air conditioner to enter a heating compensation mode; after the air conditioner enters the heating compensation mode, acquiring the initial frequency of the compressor; controlling the compressor to operate according to the initial frequency, and acquiring the operating current of the air conditioner; and performing frequency upscaling processing on the compressor according to the operating current.

[0008] According to the control method of the air conditioner of the present invention, when the outdoor ambient temperature is determined to be lower than the ambient temperature threshold, the air conditioner is controlled to enter the heating compensation mode. After the air conditioner enters the heating compensation mode, the initial frequency of the compressor is obtained, and the compressor operation is controlled according to the initial frequency. The operating current of the air conditioner is also obtained, and the compressor frequency is increased according to the operating current. In this way, it can ensure that the air conditioner will not shut down due to excessive current at the beginning of the heating mode, and can make full use of the whole power of the unit to achieve the purpose of rapid heating.

[0009] According to one embodiment of the present invention, obtaining the initial frequency of the compressor includes: obtaining the temperature range of the outdoor ambient temperature; obtaining the initial frequency according to the temperature range, wherein different temperature ranges correspond to different initial frequencies.

[0010] According to one embodiment of the present invention, frequency boosting of a compressor based on the operating current includes: when it is determined that the operating current is less than a threshold operating current, obtaining the current difference between the threshold operating current and the operating current; obtaining the frequency adjustment cycle and frequency adjustment amount of the compressor based on the current difference; and gradually increasing the frequency of the compressor based on the frequency adjustment cycle and frequency adjustment amount.

[0011] According to one embodiment of the present invention, the compressor frequency boosting process based on the operating current further includes: if the operating current is not less than the operating current threshold or the compressor frequency boosting process time is greater than a first time threshold, controlling the air conditioner to enter the normal heating mode.

[0012] According to one embodiment of the present invention, in the process of increasing the frequency of the compressor based on the operating current, the method further includes: if the coil temperature of the indoor heat exchanger is greater than the high temperature protection threshold, then reducing the frequency of the compressor; or, if the frequency of the compressor is greater than the frequency threshold, then stopping the increase of the compressor frequency.

[0013] According to one embodiment of the present invention, before obtaining the operating current of the air conditioner, the method further includes: obtaining the coil temperature of the indoor heat exchanger; if the coil temperature is not greater than the coil temperature threshold, controlling the indoor fan to be in a stationary state; if the coil temperature is greater than the coil temperature threshold, controlling the indoor fan to operate at the highest speed.

[0014] According to one embodiment of the present invention, the method further includes: when it is determined that the outdoor ambient temperature is not lower than the ambient temperature threshold, controlling the air conditioner to enter the normal heating mode.

[0015] According to one embodiment of the present invention, the method further includes: obtaining the time since the last time the air conditioner entered the heating compensation mode; if the time is not greater than a second time threshold, controlling the air conditioner to enter the normal heating mode; if the time is greater than the second time threshold, controlling the air conditioner to enter the heating compensation mode.

[0016] To achieve the above objectives, a second aspect of the present invention provides a computer-readable storage medium storing an air conditioner control program thereon, which, when executed by a processor, implements the above-described air conditioner control method.

[0017] According to an embodiment of the present invention, a computer-readable storage medium controls an air conditioner to enter a heating compensation mode when the outdoor ambient temperature is determined to be lower than an ambient temperature threshold. After the air conditioner enters the heating compensation mode, the initial frequency of the compressor is acquired, and the compressor operation is controlled according to the initial frequency. The operating current of the air conditioner is also acquired, and the compressor frequency is increased according to the operating current. This ensures that the air conditioner does not shut down due to excessive current during the initial startup of the heating mode, while fully utilizing the overall power of the unit to achieve rapid heating.

[0018] To achieve the above objectives, a third aspect of the present invention provides an air conditioner, comprising: a memory, a processor, and a control program for the air conditioner stored in the memory and executable on the processor. When the processor executes the program, it implements the above-described control method for the air conditioner.

[0019] According to an embodiment of the present invention, the air conditioner enters a heating compensation mode when the outdoor ambient temperature is determined to be lower than an ambient temperature threshold. After entering the heating compensation mode, the air conditioner acquires the initial frequency of the compressor and controls its operation based on this initial frequency. It also acquires the operating current of the air conditioner and performs frequency boosting on the compressor based on the operating current. This ensures that the air conditioner does not shut down due to excessive current during the initial startup of the heating mode, while fully utilizing the overall power to achieve rapid heating.

[0020] To achieve the above objectives, a fourth aspect of the present invention provides a control device for an air conditioner, the air conditioner including a compressor, an indoor heat exchanger, and an indoor fan, the device comprising:

[0021] The determination module is used to control the air conditioner to enter the heating compensation mode when the outdoor ambient temperature is determined to be lower than the ambient temperature threshold.

[0022] The control module is used to obtain the initial frequency of the compressor after the air conditioner enters the heating compensation mode, control the operation of the compressor according to the initial frequency, obtain the operating current of the air conditioner, and perform frequency boosting processing on the compressor according to the operating current.

[0023] According to an embodiment of the present invention, the control device for an air conditioner, through a determining module, controls the air conditioner to enter a heating compensation mode when the outdoor ambient temperature is determined to be lower than an ambient temperature threshold. After the air conditioner enters the heating compensation mode, the control module acquires the initial frequency of the compressor and controls the compressor to operate based on the initial frequency. It also acquires the operating current of the air conditioner and performs frequency boosting on the compressor based on the operating current. This ensures that the air conditioner does not shut down due to excessive current during the initial startup of the heating mode, while fully utilizing the overall power of the unit to achieve rapid heating.

[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 This is a schematic diagram of an air conditioner according to an embodiment of the present invention;

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

[0027] Figure 3 This is a flowchart illustrating the frequency upscaling process of a compressor according to an embodiment of the present invention;

[0028] Figure 4 A flowchart of a control method for an air conditioner according to another embodiment of the present invention;

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

[0030] Figure 6 This is a structural block diagram of a control device for an air conditioner according to an embodiment of the present invention. Detailed Implementation

[0031] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The air conditioner and its control method, control device, and medium provided by the embodiments of the present invention are described below with reference to the accompanying drawings.

[0032] It should be noted that when an air conditioner is operating in heating mode, the compressor's operating frequency has different upper limits depending on the outdoor ambient temperature. However, if the upper limit is set too low, the power output will be low, resulting in slow heating speed at the beginning of operation; if the upper limit is set too high, excessive current may occur at the beginning of operation, triggering the shutdown protection. Based on this, this application provides a control method for an air conditioner that ensures that the unit will not shut down due to excessive current at the beginning of heating mode startup, while also fully utilizing the unit's power to achieve rapid heating.

[0033] Figure 1 This is a schematic diagram of the structure of an air conditioner according to an embodiment of the present invention, as shown below. Figure 1As shown, the air conditioner 100 includes a compressor 101, an indoor heat exchanger 102, and an indoor fan 103. It may also include an outdoor heat exchanger 104, an outdoor fan 105, an electronic expansion valve 106, and a four-way valve 107. The compressor 101, indoor heat exchanger 102, electronic expansion valve 106, outdoor heat exchanger 104, and four-way valve 107 are sequentially connected to form the refrigerant circuit of the air conditioner 100. When the air conditioner 100 operates in heating mode, the refrigerant flow direction is as shown by the solid line in the figure. In this mode, the indoor heat exchanger 102 acts as a condenser, and the outdoor heat exchanger 104 acts as an evaporator. When the air conditioner 100 operates in cooling mode, the refrigerant flow direction is as shown by the dashed line in the figure. In this mode, the outdoor heat exchanger 104 acts as a condenser, and the indoor heat exchanger 102 acts as an evaporator. When the air conditioner structure described above is used in heating mode, the control method in this embodiment of the invention can ensure that the unit will not shut down due to excessive current in the initial stage of heating mode startup, and can make full use of the unit's power to achieve rapid heating.

[0034] Figure 2 A flowchart of a control method for an air conditioner according to an embodiment of the present invention is shown below. Figure 2 As shown, the method may include the following steps:

[0035] Step S201: When the outdoor ambient temperature is determined to be lower than the ambient temperature threshold, control the air conditioner to enter the heating compensation mode.

[0036] Specifically, to simplify the operation of air conditioners, it's not necessary to compensate for heating mode under all outdoor ambient temperature conditions. Heating compensation is only required when the outdoor temperature is low. Therefore, an ambient temperature threshold can be set, and the heating compensation mode is activated only when the outdoor ambient temperature is lower than this threshold during the initial operation of heating mode. This ambient temperature threshold can be set either before the air conditioner leaves the factory or by the user or maintenance personnel after installation, based on the specific model and geographical location.

[0037] Step S202: After entering the heating compensation mode, obtain the initial frequency of the compressor.

[0038] The process of obtaining the compressor's initial frequency may include: obtaining the temperature range of the outdoor ambient temperature; and obtaining the initial frequency based on the temperature range, wherein different temperature ranges correspond to different initial frequencies.

[0039] In other words, the outdoor ambient temperature can be divided into different temperature ranges. When entering the heating compensation mode, the current outdoor ambient temperature can be detected, and the temperature range it falls within can be determined based on that temperature. Furthermore, since the air conditioner operates at different initial frequencies within different temperature ranges, the compressor's initial frequency can be obtained based on the current outdoor ambient temperature after entering the heating compensation mode.

[0040] Step S203: Control the compressor to run according to the initial frequency and obtain the operating current of the air conditioner.

[0041] In other words, after entering the heating compensation mode, the initial frequency of the compressor is first obtained, and the compressor is controlled to run at that initial frequency. At the same time, since the operating current I (i.e., the total current of the unit, including the indoor unit current and the outdoor unit current) directly affects the heating control of the air conditioner, the current operating current I of the air conditioner is detected when the compressor is running at the initial frequency.

[0042] Step S204: Increase the frequency of the compressor according to the operating current I.

[0043] Specifically, Figure 3 A flowchart of upsampling processing according to an embodiment of the present invention is provided, with reference to... Figure 3 As shown, the following steps may be included:

[0044] Step S301: When it is determined that the operating current I is less than the operating current threshold Im, obtain the current difference between the operating current threshold Im and the operating current I.

[0045] Step S302: Obtain the compressor's frequency regulation cycle TS and frequency regulation amount k based on the current difference.

[0046] Step S303: Gradually increase the compressor frequency f according to the frequency adjustment cycle TS and the frequency adjustment amount k.

[0047] Specifically, after obtaining the operating current I in heating mode, it can be first determined whether the operating current I is less than the operating current threshold Im. It should be noted that this operating current threshold Im can be equal to or less than the safe current limit corresponding to the starting current protection. If the operating current I is less than its threshold Im, the current difference Im-I is obtained, and the frequency adjustment amount k and the frequency adjustment period TS are derived from this current difference Im-I. In a specific example, the relationship between the current difference and the compressor's frequency adjustment period TS and frequency adjustment amount k as the operating current I changes is shown in Tables 1 and 2.

[0048] Im-I(A) TS(s) Im-I≥2 15 2>Im-I≥1 30 Im-I < 1 45

[0049] Table 1

[0050] Im-I(A) k(Hz) Im-I≥3 2 3>Im-I≥1 1 Im-I < 1 0.5

[0051] Table 2

[0052] As shown in Tables 1 and 2, when Im-I ≥ 3, the compressor frequency f is updated once every 15 seconds, and the frequency f increases by 2 Hz each time; when 3 > Im-I ≥ 2, the compressor frequency f is updated once every 15 seconds, and the frequency f increases by 1 Hz each time; when 2 > Im-I ≥ 1, the compressor frequency f is updated once every 30 seconds, and the frequency f increases by 1 Hz each time; when 1 ≥ Im-I, the compressor frequency f is updated once every 45 seconds, and the frequency f increases by 0.5 Hz each time.

[0053] As can be seen from the above, the embodiments of the present invention incorporate a heating compensation mode for indoor heating at low temperatures. When a low outdoor ambient temperature is detected, the system operates according to the heating compensation mode. Upon activating the heating compensation mode, the system initially operates at an initial frequency, and then the compressor's frequency is increased by detecting the difference between the current operating current and the operating current threshold. This ensures that the system does not shut down due to excessive current during the initial startup of the heating mode, while also fully utilizing the overall power of the unit to achieve rapid heating.

[0054] In one embodiment, the method further includes: if the frequency upsampling time is greater than a first time threshold or the operating current is not less than the operating current threshold, controlling the air conditioner to enter normal heating mode.

[0055] Specifically, during the frequency upscaling process, when the operating current is greater than or equal to the operating current threshold, the air conditioner starts the normal heating mode. In normal heating mode, when the operating current equals the operating current threshold, the control frequency f remains unchanged; when the operating current exceeds the safe current limit due to the rise in indoor ambient temperature, the frequency f can be controlled to decrease. Furthermore, since the compressor typically does not require further frequency upscaling after the initial stage of heating mode operation, a first time threshold (e.g., 30 minutes) can be set. When the frequency upscaling time exceeds this first time threshold, the normal heating mode can be activated.

[0056] Furthermore, in the process of frequency increase processing based on the operating current, the method also includes: if the coil temperature of the indoor heat exchanger is greater than the high temperature protection threshold, then reduce the compressor frequency; or, if the compressor frequency is greater than the frequency threshold, then stop increasing the compressor frequency.

[0057] Specifically, the indoor heat exchanger contains coils for efficient heat exchange. If the temperature of these coils is too high, it indicates that the condensing temperature inside the heating chamber is too high, meaning the air conditioner is overloaded. This can trigger the evaporator's high-temperature protection. In this example, the frequency can be reduced to decrease the air conditioner's load, thereby lowering the condensing temperature inside the heating chamber and reducing the coil temperature of the indoor heat exchanger, effectively preventing the evaporator's high-temperature protection from being triggered. Furthermore, during the frequency ramp-up process, the compressor frequency can have an upper limit, i.e., a frequency threshold. When the compressor frequency exceeds this threshold, the frequency can be controlled to stop increasing. It should be noted that the upper limit of the compressor frequency may vary between different air conditioner models; please refer to the compressor's datasheet for details.

[0058] In one embodiment, the method further includes: obtaining the coil temperature of the indoor heat exchanger; if the coil temperature is not greater than a coil temperature threshold, controlling the indoor fan to be stationary; if the coil temperature is greater than the coil temperature threshold, controlling the indoor fan to operate at the highest speed.

[0059] In other words, when the coil temperature is less than or equal to the coil temperature threshold, the indoor fan speed is maintained at 0 rad / min; when the coil temperature is greater than the coil temperature threshold, the indoor fan speed is controlled at the given maximum speed. It can be understood that this coil temperature threshold is usually less than, but can also be equal to, its high-temperature protection threshold. It should be noted that different coil temperature thresholds can be used for different air conditioners; in this specific example, the indoor fan coil temperature threshold can be greater than 25°C.

[0060] In one embodiment, the method further includes: controlling the air conditioner to enter normal heating mode when it is determined that the outdoor ambient temperature is not lower than an ambient temperature threshold.

[0061] In other words, an ambient temperature threshold can be set, and during the initial operation of heating mode, the heating compensation mode will only be activated when the outdoor ambient temperature is lower than the threshold. When the outdoor ambient temperature is greater than or equal to the threshold, the air conditioner will switch to normal heating mode. It should be noted that in normal heating mode, the upper limit of the compressor frequency can be determined based on the outdoor ambient temperature (refer to the compressor datasheet for details), and the compressor will be controlled to operate at the maximum frequency of this upper limit.

[0062] In one embodiment, the method further includes: obtaining the time elapsed since the last time the air conditioner entered the heating compensation mode; if the time is less than or equal to a second time threshold, controlling the air conditioner to enter the normal heating mode; if the time is greater than the second time threshold, controlling the air conditioner to enter the heating compensation mode.

[0063] In other words, when the air conditioner is in indoor heating mode, it checks whether the time interval since the last entry into heating compensation mode is greater than a second time threshold (e.g., 2 hours). If this condition is met, the heating compensation mode is activated; otherwise, the air conditioner is controlled to enter normal heating mode. This prevents the air conditioner from entering heating compensation mode too frequently, causing the machine to be under high load for extended periods and resulting in excessive energy consumption. It should be noted that upon initial power-on, it can be assumed that a considerable amount of time has passed since the last entry into heating compensation mode. In this case, although the recorded time for the last entry into heating compensation mode is 0, the system will still proceed directly to the next check.

[0064] The following specific example will be used for further explanation and illustration. Figure 4 This is a flowchart of an air conditioner control method according to an embodiment of the present invention. (Reference) Figure 4 As shown, the control method includes the following steps:

[0065] Step S401: After the low-temperature heating operation starts, determine whether the time since the last entry into the heating compensation mode is greater than 2 hours. If yes, proceed to step S402; otherwise, operate in normal heating mode.

[0066] Step S402: Determine whether the outdoor ambient temperature is lower than the ambient temperature threshold. If yes, proceed to step S403; otherwise, operate in normal heating mode.

[0067] Step S403: Determine the initial frequency of the compressor based on the outdoor ambient temperature.

[0068] Step S404: Determine whether the coil temperature is greater than the coil temperature threshold. If yes, control the indoor fan speed to the given maximum speed. If no, control the indoor fan speed to 0 rad / min.

[0069] Step S405: Determine whether the operating current is less than the operating current threshold. If yes, proceed to step S406; otherwise, proceed to step S407.

[0070] Step S406: The compressor frequency remains unchanged.

[0071] Step S407: Determine whether the upsampling processing time is greater than 30 minutes. If yes, proceed to step S408; otherwise, proceed to step S409.

[0072] Step S408: Switch to normal heating mode.

[0073] Step S409: The indoor fan speed is the given maximum speed.

[0074] Step S410: After executing step S406, determine whether the upsampling processing time is greater than 30 minutes. If yes, execute step S408; otherwise, return to step S406.

[0075] It should be understood that, although Figures 2-4 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 herein, there is no strict order in which these steps are executed, and they can be performed in other orders. Figures 2-4 At 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.

[0076] In summary, by controlling the air conditioner to enter heating compensation mode, and after entering this mode, obtaining the compressor's initial frequency and controlling its operation accordingly, as well as obtaining the air conditioner's operating current and adjusting the compressor's frequency based on that current, it is possible to ensure that the air conditioner does not shut down due to excessive current during the initial startup of heating mode, while also fully utilizing the unit's power to achieve rapid heating.

[0077] 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.

[0078] According to the computer-readable storage medium of the present invention, when the control program of the air conditioner is executed by the processor, the above-described control method of the air conditioner is implemented. This ensures that the air conditioner will not shut down due to excessive current during the initial start-up of the heating mode, and also makes full use of the power of the whole machine to achieve the purpose of rapid heating.

[0079] Figure 5 This is a structural block diagram of an air conditioner according to an embodiment of the present invention. (Reference) Figure 5 As shown, the air conditioner 500 includes: a memory 501, a processor 502, and a control program for the air conditioner stored in the memory 501 and executable on the processor 502. When the processor 502 executes the program, it implements the control method for the air conditioner described above.

[0080] According to an embodiment of the present invention, the air conditioner implements the control method described above when the processor executes the control program. This ensures that the air conditioner will not shut down due to excessive current during the initial startup of the heating mode, while also fully utilizing the overall power of the unit to achieve rapid heating.

[0081] Figure 6 This is a structural block diagram of a control device for an air conditioner according to an embodiment of the present invention. (Reference) Figure 6 As shown, the control device 600 of the air conditioner includes a determination module 601 and a control module 602. The determination module 601 is used to control the operation of the heating compensation mode when the outdoor ambient temperature is determined to be lower than the ambient temperature threshold. The control module 602 is used to obtain the initial frequency of the compressor after entering the heating compensation mode, control the compressor to operate according to the initial frequency, obtain the operating current of the air conditioner, and perform frequency boosting processing on the compressor according to the operating current.

[0082] It should be noted that, to simplify the operation of the air conditioner, it is not necessary to compensate for the heating mode under all outdoor ambient temperature conditions. Therefore, an ambient temperature threshold can be set, and during the initial operation of the heating mode, the heating compensation mode is only activated when the outdoor ambient temperature is lower than the threshold. Once in heating compensation mode, the initial frequency of the compressor is first obtained, and its operation is controlled based on this initial frequency. Since the operating current (i.e., the total current, including the indoor and outdoor unit current) is a key parameter affecting the air conditioner's operation, the current operating current is detected when the compressor is running at its initial frequency, and frequency boosting is performed based on this operating current.

[0083] In one embodiment, the control module 602 is specifically used to: obtain the temperature range of the outdoor ambient temperature; and obtain an initial frequency based on the temperature range, wherein different temperature ranges correspond to different initial frequencies.

[0084] In other words, the outdoor ambient temperature can be divided into different temperature ranges. When entering the heating compensation mode, the current outdoor ambient temperature can be detected, and the temperature range it falls within can be determined based on that temperature. Furthermore, since the air conditioner operates at different initial frequencies within different temperature ranges, the compressor's initial frequency can be obtained based on the current outdoor ambient temperature after entering the heating compensation mode.

[0085] In one embodiment, the control module 602 is specifically used to: obtain the current difference between the operating current threshold and the operating current; obtain the compressor's frequency adjustment cycle and frequency adjustment amount based on the current difference; and gradually increase the compressor's frequency based on the frequency adjustment cycle and frequency adjustment amount.

[0086] Specifically, after obtaining the operating current I in heating mode, it is determined whether the operating current I is less than the operating current threshold Im. It should be noted that this operating current threshold Im can be equal to or less than the safe current limit corresponding to the starting current protection. If the operating current I is less than the threshold Im, the current difference Im-I is obtained, and the compressor's frequency adjustment period TS and frequency adjustment amount k are obtained based on this current difference |Im-I|.

[0087] In one embodiment, the control module 602 is specifically used to: control the air conditioner to enter the normal heating mode if the operating current is not less than the operating current threshold or the compressor's frequency ramp-up processing time is greater than the first time threshold.

[0088] Specifically, during the frequency upscaling process, when the operating current is greater than or equal to the operating current threshold, the air conditioner starts the normal heating mode. In normal heating mode, when the operating current equals the operating current threshold, the control frequency f remains unchanged. When the indoor ambient temperature rises, causing the operating current to exceed the operating current threshold, if the operating current threshold is less than the safe current limit, the control frequency f can decrease; if the operating current threshold is less than the safe current limit, overcurrent protection can be activated. Furthermore, since the compressor typically does not need further frequency upscaling after the initial stage of heating mode operation, a first time threshold (e.g., 30 minutes) can be set. When the frequency upscaling time exceeds this first time threshold, the air conditioner can enter normal heating mode.

[0089] In one embodiment, the control module 602 is specifically configured to: control the compressor frequency to decrease if the coil temperature of the indoor heat exchanger is greater than the high temperature protection threshold; or, stop increasing the compressor frequency if the compressor frequency is greater than the frequency threshold.

[0090] Specifically, if the coil temperature of the indoor heat exchanger is too high, it indicates that the condensing temperature in the heating chamber is too high, meaning the air conditioner is overloaded. This can trigger the evaporator's high-temperature protection. In a specific example, the frequency can be reduced to decrease the air conditioner's load, thereby lowering the condensing temperature in the heating chamber and reducing the coil temperature of the indoor heat exchanger, effectively preventing the evaporator's high-temperature protection from being triggered. Additionally, during the frequency ramp-up process, the compressor frequency can have an upper limit, i.e., a frequency threshold. When the compressor frequency exceeds this threshold, the frequency ramp-up can be stopped. It should be noted that the upper limit of the compressor frequency can vary between different air conditioner models; please refer to the compressor's datasheet for details.

[0091] In one embodiment, the control module 602 is specifically used to: obtain the coil temperature of the indoor heat exchanger; if the coil temperature is less than or equal to the coil temperature threshold, control the indoor fan to be in a stationary state; if the coil temperature is greater than the coil temperature threshold, control the indoor fan to run at the highest speed.

[0092] In other words, when the coil temperature is less than or equal to the coil temperature threshold, the indoor fan speed is maintained at 0 rad / min; when the coil temperature is greater than the coil temperature threshold, the indoor fan speed is controlled at the given maximum speed. It is understood that the coil temperature threshold is usually less than, but can also be equal to, its high-temperature protection threshold. It should be noted that different coil temperature thresholds can be used for different air conditioners; in this specific example, the indoor fan coil temperature threshold can be greater than 25°C.

[0093] In one embodiment, the determining module 601 is specifically used to: control the air conditioner to enter normal heating mode when it is determined that the outdoor ambient temperature is greater than or equal to the ambient temperature threshold.

[0094] It should be noted that in normal heating mode, the upper limit of the compressor frequency can be determined according to the outdoor ambient temperature (refer to the compressor specification sheet for details), and the compressor can be controlled to operate at the maximum frequency of this upper limit.

[0095] In one embodiment, the control module 602 is specifically used to: obtain the time since the last entry into the heating compensation mode; if the time is not greater than a second time threshold, control the air conditioner to enter the normal heating mode; if the time is greater than the second time threshold, control the air conditioner to enter the heating compensation mode.

[0096] In other words, when the air conditioner is heating the room, it checks if the following condition is met: the time interval since the last entry into heating compensation mode is greater than a second time threshold (e.g., 2 hours). If this condition is met, the heating compensation mode is activated; otherwise, the air conditioner is controlled to enter normal heating mode. It should be noted that upon initial power-on, the default time is 0 hours; if the time is less than 2 hours, the next check is initiated.

[0097] The control device for an air conditioner according to an embodiment of the present invention controls the air conditioner to enter a heating compensation mode. After entering the heating compensation mode, it acquires the initial frequency of the compressor and controls the compressor operation based on the initial frequency. It also acquires the operating current of the air conditioner and performs frequency boosting on the compressor based on the operating current. This ensures that the air conditioner does not shut down due to excessive current during the initial startup of the heating mode, while fully utilizing the overall power of the unit to achieve rapid heating.

[0098] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, such as a ordered list of executable instructions for implementing logical functions, 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: electrical connections having one or more wires (electronic devices), portable computer disk drives (magnetic devices), 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, such as by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0099] 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. 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.

[0100] 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.

[0101] 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, The air conditioner includes a compressor, an indoor heat exchanger, and an indoor fan; the method includes: When it is determined that the outdoor ambient temperature is lower than the ambient temperature threshold, the air conditioner is controlled to enter the heating compensation mode. After the air conditioner enters the heating compensation mode, the initial frequency of the compressor is obtained; The compressor is controlled to operate according to the initial frequency, and the operating current of the air conditioner is obtained; The compressor is frequency-increased based on the operating current. When it is determined that the operating current is less than the operating current threshold, the current difference between the operating current threshold and the operating current is obtained; The frequency adjustment cycle and frequency adjustment amount of the compressor are obtained based on the current difference. The frequency of the compressor is gradually increased according to the frequency adjustment cycle and the frequency adjustment amount; The process of increasing the frequency of the compressor based on the operating current also includes: If the operating current is not less than the operating current threshold or the compressor's frequency ramp-up processing time is greater than the first time threshold, the air conditioner is controlled to enter the normal heating mode.

2. The method according to claim 1, characterized in that, Obtaining the initial frequency of the compressor includes: Obtain the temperature range of the outdoor ambient temperature; The initial frequency is obtained based on the temperature range, wherein different temperature ranges correspond to different initial frequencies.

3. The method according to claim 1, characterized in that, In the process of frequency boosting of the compressor based on the operating current, the method further includes: If the coil temperature of the indoor heat exchanger exceeds the high-temperature protection threshold, then reduce the frequency of the compressor; or, If the frequency of the compressor is greater than the frequency threshold, then the frequency of the compressor will stop increasing.

4. The method according to claim 1, characterized in that, Before obtaining the operating current of the air conditioner, the method further includes: Obtain the coil temperature of the indoor heat exchanger; If the coil temperature is not greater than the coil temperature threshold, then the indoor fan is controlled to be in a stationary state. If the coil temperature is greater than the coil temperature threshold, the indoor fan is controlled to run at the highest speed.

5. The method according to claim 1, characterized in that, Also includes: When the outdoor ambient temperature is determined to be not less than the ambient temperature threshold, the air conditioner is controlled to enter the normal heating mode.

6. The method according to claim 1, characterized in that, Also includes: Get the time since the last time the air conditioner entered the heating compensation mode; If the time is not greater than the second time threshold, then the air conditioner is controlled to enter the normal heating mode; If the time exceeds the second time threshold, the air conditioner is controlled to enter the heating compensation mode.

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

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

9. A control device for an air conditioner, characterized in that, The air conditioner includes a compressor, an indoor heat exchanger, and an indoor fan; the device includes: The determination module is used to control the air conditioner to enter the heating compensation mode when it is determined that the outdoor ambient temperature is lower than the ambient temperature threshold. The control module is used to acquire the initial frequency of the compressor after the air conditioner enters the heating compensation mode, control the operation of the compressor according to the initial frequency, acquire the operating current of the air conditioner, and perform frequency boosting processing on the compressor according to the operating current. When it is determined that the operating current is less than the operating current threshold, the current difference between the operating current threshold and the operating current is obtained; The frequency adjustment cycle and frequency adjustment amount of the compressor are obtained based on the current difference. The frequency of the compressor is gradually increased according to the frequency adjustment cycle and the frequency adjustment amount; The process of increasing the frequency of the compressor based on the operating current also includes: If the operating current is not less than the operating current threshold or the compressor's frequency ramp-up processing time is greater than the first time threshold, the air conditioner is controlled to enter the normal heating mode.

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