Control method and device of air conditioner, air conditioner and storage medium

Abstract

The present application relates to the technical field of air conditioners, and particularly relates to a control method and device of an air conditioner, the air conditioner and a storage medium, the present application obtains the change trend of the output performance of the air conditioner and the refrigerant pressure in the refrigerant pipeline of the air conditioner; the operating frequency of the compressor of the air conditioner is adjusted according to the change trend of the output performance and the refrigerant pressure, the operating frequency of the compressor of the air conditioner is adaptively adjusted by combining the change trend of the output performance of the air conditioner and the value of the refrigerant pressure, more complex environments are adapted, and the technical problem that the air conditioner operation protection scheme in the prior art cannot adapt to complex environments and has low reliability is avoided.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and more particularly to control methods, devices, air conditioners, and storage media for air conditioners. Background Technology

[0002] Traditional air conditioner operation protection schemes generally use a single parameter as the protection condition to achieve pre-protection during the air conditioner's operation, such as stopping when the temperature is reached or stopping at a set time. However, when facing complex environments, these schemes cannot fully meet the compressor's operating range and comfort requirements, leading to the compressor exceeding its reliability requirements under certain conditions. This results in the compressor being prone to wear and tear, affecting the overall lifespan of the air conditioner.

[0003] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0004] The main objective of this invention is to provide a control method, device, air conditioner, and storage medium for an air conditioner, aiming to solve the technical problem that existing air conditioner operation protection schemes cannot adapt to complex environments and have low reliability.

[0005] To achieve the above objectives, the present invention provides a control method for an air conditioner, the method comprising the following steps:

[0006] To obtain the changing trend of the air conditioner's output performance and the refrigerant pressure in the air conditioner's refrigerant pipes;

[0007] The operating frequency of the air conditioner's compressor is adjusted based on the changing trend of the output performance and the refrigerant pressure.

[0008] Optionally, the refrigerant pressure includes a first refrigerant pressure and a second refrigerant pressure, wherein the first refrigerant pressure is the pressure value before refrigerant throttling, and the second refrigerant pressure is the pressure value after refrigerant throttling;

[0009] The step of adjusting the operating frequency of the air conditioner's compressor based on the changing trend of the output performance and the refrigerant pressure includes:

[0010] When the output performance of the air conditioner increases, the operating frequency of the air conditioner's compressor is adjusted according to the control strategy corresponding to the first refrigerant pressure;

[0011] When the output performance of the air conditioner decreases, the operating frequency of the air conditioner's compressor is adjusted according to the control strategy corresponding to the second refrigerant pressure.

[0012] Optionally, adjusting the operating frequency of the air conditioner's compressor according to the control strategy corresponding to the first refrigerant pressure includes:

[0013] When the first refrigerant pressure is greater than or equal to the first high-pressure threshold and less than the second high-pressure threshold, the operating frequency of the compressor is increased based on a preset frequency increase strategy until the first refrigerant pressure is less than the first high-pressure threshold and the first high-pressure threshold is less than the second high-pressure threshold.

[0014] When the first refrigerant pressure is greater than or equal to the second high-pressure threshold and less than the third high-pressure threshold, the operating frequency of the compressor is increased based on a preset frequency limiting strategy until the first refrigerant pressure is less than the first high-pressure threshold and the second high-pressure threshold is less than the third high-pressure threshold.

[0015] When the first refrigerant pressure is greater than or equal to the third high-pressure threshold and less than the fourth high-pressure threshold, the operating frequency of the compressor is reduced based on the first frequency reduction rate until the first refrigerant pressure is less than the lower limit of the operating frequency of the compressor and the third high-pressure threshold is less than the fourth high-pressure threshold.

[0016] When the first refrigerant pressure is greater than or equal to the fourth high-pressure threshold and less than the fifth high-pressure threshold, the operating frequency of the compressor is reduced based on the second frequency reduction rate until the first refrigerant pressure is less than the lower limit of the operating frequency of the compressor and the fourth high-pressure threshold is less than the fifth high-pressure threshold.

[0017] When the first refrigerant pressure is greater than or equal to the fifth high-pressure threshold, the compressor is controlled to stop.

[0018] Optionally, the control method for the air conditioner further includes:

[0019] Obtain the duration of continuous compressor shutdown;

[0020] The compressor is started when the first refrigerant pressure is less than the second high-pressure threshold and the continuous shutdown duration is greater than or equal to the preset duration.

[0021] Optionally, adjusting the operating frequency of the air conditioner's compressor according to the control strategy corresponding to the second refrigerant pressure includes:

[0022] When the second refrigerant pressure is greater than or equal to the second low-pressure threshold and less than the first low-pressure threshold, the operating frequency of the compressor is reduced based on a preset frequency reduction strategy until the second refrigerant pressure is less than the first low-pressure threshold and the first low-pressure threshold is greater than the second low-pressure threshold.

[0023] When the second refrigerant pressure is greater than or equal to the third low-pressure threshold and less than the second low-pressure threshold, the operating frequency of the compressor is reduced based on a preset frequency limiting strategy until the second refrigerant pressure is less than the first low-pressure threshold and the second low-pressure threshold is greater than the third low-pressure threshold.

[0024] When the second refrigerant pressure is greater than or equal to the fourth low-pressure threshold and less than the third low-pressure threshold, the compressor operating frequency is increased based on the first frequency reduction rate until the second refrigerant pressure is less than the lower limit of the compressor operating frequency and the third low-pressure threshold is greater than the fourth low-pressure threshold.

[0025] When the second refrigerant pressure is greater than or equal to the fifth low-pressure threshold and less than the fourth low-pressure threshold, the compressor operating frequency is increased based on the second frequency reduction rate until the second refrigerant pressure is less than the lower limit of the compressor operating frequency, and the fourth low-pressure threshold is greater than the fifth low-pressure threshold.

[0026] When the pressure of the second refrigerant is less than the fifth low-pressure threshold, the compressor is controlled to stop.

[0027] Optionally, before adjusting the operating frequency of the air conditioner's compressor based on the changing trend of the output performance and the refrigerant pressure, the method further includes:

[0028] Obtain the current operating frequency of the air conditioner's compressor;

[0029] Based on the operating frequency range of the current operating frequency, the corresponding high-pressure threshold set is queried through a preset mapping relationship, including the first theoretical upper limit value of the first refrigerant pressure and the second theoretical upper limit value and theoretical lower limit value of the second refrigerant pressure.

[0030] A set of high-pressure thresholds is determined based on the first theoretical upper limit value. The set of high-pressure thresholds is used to determine the pressure range of the first refrigerant pressure when the output performance of the air conditioner increases.

[0031] A set of low-pressure thresholds is determined based on the second theoretical upper limit and the theoretical lower limit. The set of low-pressure thresholds is used to determine the pressure range of the second refrigerant pressure when the output performance of the air conditioner decreases.

[0032] Optionally, the control method for the air conditioner further includes:

[0033] Obtain the rated operating frequency range of the compressor;

[0034] The rated operating frequency range is divided into multiple operating frequency ranges;

[0035] Determine the first theoretical upper limit value and the second theoretical upper limit value and the theoretical lower limit value of the second refrigerant pressure corresponding to each operating frequency range to obtain the preset mapping relationship.

[0036] Furthermore, to achieve the above objectives, the present invention also proposes a control device for an air conditioner, the control device comprising:

[0037] The acquisition module is used to acquire the changing trend of the air conditioner's output performance and the refrigerant pressure in the air conditioner's refrigerant pipes.

[0038] The adjustment module is used to adjust the operating frequency of the air conditioner's compressor based on the changing trend of the output performance and the refrigerant pressure.

[0039] Furthermore, to achieve the above objectives, the present invention also proposes an air conditioner, the air conditioner comprising: a memory, a processor, and a control program for the air conditioner stored in the memory and executable on the processor, the control program being configured to implement the steps of the control method for the air conditioner as described above.

[0040] In addition, to achieve the above objectives, the present invention also proposes a storage medium storing a control program for an air conditioner, wherein the control program for the air conditioner, when executed by a processor, implements the steps of the control method for the air conditioner as described above.

[0041] In addition, to achieve the above objectives, this application also provides a computer program product, which includes a computer program that, when executed by a processor, implements the steps of the air conditioner control method described above.

[0042] One or more technical solutions proposed in this application have at least the following technical effects: This invention obtains the changing trend of the air conditioner's output performance and the refrigerant pressure in the air conditioner's refrigerant pipe; adjusts the operating frequency of the air conditioner's compressor according to the changing trend of the output performance and the refrigerant pressure; and adaptively adjusts the operating frequency of the air conditioner's compressor by combining the changing trend of the air conditioner's output performance and the value of the refrigerant pressure, thus adapting to more complex environments and avoiding the technical problem that the existing air conditioner operation protection scheme cannot adapt to complex environments and has low reliability. Attached Figure Description

[0043] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0044] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This is a flowchart illustrating the first embodiment of the control method for an air conditioner according to the present invention;

[0046] Figure 2 This is a flowchart illustrating the second embodiment of the control method for an air conditioner according to the present invention;

[0047] Figure 3 This is a flowchart illustrating the third embodiment of the control method for an air conditioner according to the present invention;

[0048] Figure 4 This is a schematic diagram of the high-pressure refrigerant pressure upper limit - compressor frequency mapping according to an embodiment of the control method of the air conditioner of the present invention;

[0049] Figure 5 This is a schematic diagram of the low-pressure refrigerant pressure upper / lower limit - compressor frequency mapping according to an embodiment of the control method of the air conditioner of the present invention;

[0050] Figure 6 This is a structural block diagram of the first embodiment of the control device for the air conditioner of the present invention;

[0051] Figure 7 This is a schematic diagram of the structure of an air conditioner in the hardware operating environment involved in the embodiments of the present invention.

[0052] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0053] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0054] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0055] The main solution of this application embodiment is: to obtain the changing trend of the air conditioner's output performance and the refrigerant pressure in the air conditioner's refrigerant pipe; and to adjust the operating frequency of the air conditioner's compressor according to the changing trend of the output performance and the refrigerant pressure.

[0056] In this embodiment, for ease of description, the controller that identifies the air conditioner will be used as the execution subject in the following description.

[0057] Traditional air conditioner operation protection schemes in existing technologies generally use a single parameter as the protection condition to achieve pre-protection during the air conditioner's operation, such as stopping when the temperature is reached or stopping at a set time. However, when facing complex environments, these schemes cannot fully meet the compressor's operating range requirements and comfort requirements. This can lead to the compressor exceeding its reliability requirements under certain conditions, causing it to wear out easily and affecting the overall lifespan of the air conditioner. In particular, they cannot meet the user's comfort requirements under certain high-load demand conditions.

[0058] This application provides a solution that allows the air conditioner to adaptively adjust the compressor's operating frequency by combining the changing trend of the air conditioner's output performance with the refrigerant pressure in the refrigerant pipeline during operation. This ensures that the air conditioner's output performance matches its energy needs, avoiding situations where the air conditioner's output performance cannot meet the user's requirements under high load conditions, or where the air conditioner's output performance is too high under low load conditions, resulting in frequent shutdowns.

[0059] Based on this, embodiments of the present invention provide a control method for an air conditioner, referring to... Figure 1 , Figure 1 This is a flowchart illustrating the first embodiment of a control method for an air conditioner according to the present invention.

[0060] In this embodiment, the control method for the air conditioner includes the following steps:

[0061] Step S10: Obtain the trend of the air conditioner's output performance and the refrigerant pressure in the air conditioner's refrigerant pipes.

[0062] It should be noted that the executing entity in this embodiment can be a computing service device with data processing, network communication, and program execution functions, such as an air conditioner controller or control chip. The following description uses an air conditioner controller as an example to illustrate this embodiment and the subsequent embodiments.

[0063] It should be noted that the output performance of an air conditioner refers to its ability to change air parameters in different modes, such as the heating capacity in heating mode, the cooling capacity in cooling mode, and the dehumidification capacity in dehumidification mode.

[0064] In practice, if the air conditioner is under a high load, the compressor's operating frequency or the refrigerant pressure in the air conditioner will increase in order to meet the cooling or heating requirements under high load conditions. Similarly, if the air conditioner is under a low load, in order to avoid frequent start-stop situations, the compressor's operating frequency or the refrigerant pressure in the air conditioner can be reduced to decrease the air conditioner's output performance and meet the user's comfort requirements.

[0065] Under different output performance change trends, the boundary protection they face also differs. For example, if the air conditioner's load exceeds its actual output performance, in order to meet the user's comfort requirements, the compressor's operating frequency and the refrigerant pressure in the pipes will generally increase during subsequent operation. In this case, it is necessary to consider whether the compressor's operating frequency will reach the rated upper limit of the operating frequency or whether the refrigerant pressure will exceed the pressure upper limit in this scenario, causing damage to the compressor or other components. If the air conditioner's load is less than its actual output performance, in order to meet the user's comfort requirements, the compressor's operating frequency and the refrigerant pressure in the pipes will generally decrease during subsequent operation, reducing the air conditioner's output performance. In this case, it is necessary to consider whether the compressor's operating frequency will reach the rated lower limit of the operating frequency or whether the refrigerant pressure will exceed the pressure lower limit in this scenario, causing the compressor or air conditioner to shut down.

[0066] Furthermore, the steps for obtaining the changing trend of the air conditioner's output performance include:

[0067] Obtain the set load and actual output performance of the air conditioner; determine the trend of output performance change based on the set load and actual output performance.

[0068] The set load is related to the set temperature, humidity, and operating mode. The greater the difference between the set load and the output performance, the greater the trend of output performance change, and the compressor's operating frequency and the refrigerant pressure in the pipeline will generally increase. The smaller the difference between the set load and the output performance, the less the trend of output performance change, and the compressor's operating frequency and the refrigerant pressure in the pipeline will generally decrease.

[0069] The refrigerant pressure in the refrigerant pipes of the air conditioner includes a first refrigerant pressure and a second refrigerant pressure. The first refrigerant pressure is the pressure value before refrigerant throttling, and the second refrigerant pressure is the pressure value after refrigerant throttling. The first refrigerant pressure can also be called the high-pressure refrigerant pressure, and the second refrigerant pressure can be called the low-pressure refrigerant pressure. The first and second refrigerant pressures can be directly detected by pressure sensors installed in corresponding positions, or they can be calculated by detecting the coil temperature of the condenser and the coil temperature of the evaporator according to the operating mode of the air conditioner. This embodiment does not impose specific limitations on this.

[0070] Step S20: Adjust the operating frequency of the air conditioner compressor according to the changing trend of the output performance and the refrigerant pressure.

[0071] It is understandable that the operating frequency of the compressor can directly affect the output performance of the air conditioner to meet the user's needs. For example, the higher the operating frequency, the greater the output performance of the air conditioner; the lower the operating frequency, the smaller the output performance of the air conditioner. The compressor's operating power and the opening degree of the throttling element can also play the same role. In this embodiment, the operating power of the compressor and / or the opening degree of the throttling element can be adjusted according to the trend of the output performance and the refrigerant pressure to achieve the operation protection control of the air conditioner.

[0072] This embodiment obtains the changing trend of the air conditioner's output performance and the refrigerant pressure in the air conditioner's refrigerant pipes; and adjusts the operating frequency of the air conditioner's compressor according to the changing trend of the output performance and the refrigerant pressure. By combining the changing trend of the air conditioner's output performance and the value of the refrigerant pressure, the operating frequency of the air conditioner's compressor is adaptively adjusted to adapt to more complex environments, avoiding the technical problem that the existing air conditioner operation protection scheme cannot adapt to complex environments and has low reliability.

[0073] Based on the first embodiment of this application, in the second embodiment of this application, the content that is the same as or similar to that in the first embodiment described above can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 2 Step S20 includes:

[0074] Step S201: When the output performance of the air conditioner increases, adjust the operating frequency of the air conditioner's compressor according to the control strategy corresponding to the first refrigerant pressure.

[0075] It should be noted that an increase in the output performance of an air conditioner indicates an increase in the pressure and / or the operating frequency of the compressor. In order to prevent the high-pressure refrigerant in the air conditioner from exceeding its high-pressure limit and damaging the equipment, this embodiment can adjust the operating frequency of the air conditioner's compressor according to the control strategy corresponding to the first refrigerant pressure, so as to slow down the rate of increase of the compressor's operating frequency or reduce the compressor's operating frequency when it is about to exceed the limit, thereby avoiding equipment damage.

[0076] Further, adjusting the operating frequency of the air conditioner's compressor according to the control strategy corresponding to the first refrigerant pressure includes:

[0077] When the first refrigerant pressure is greater than or equal to the first high-pressure threshold and less than the second high-pressure threshold, the operating frequency of the compressor is increased based on a preset frequency increase strategy until the first refrigerant pressure is less than the first high-pressure threshold and the first high-pressure threshold is less than the second high-pressure threshold.

[0078] When the first refrigerant pressure is greater than or equal to the second high-pressure threshold and less than the third high-pressure threshold, the operating frequency of the compressor is increased based on a preset frequency limiting strategy until the first refrigerant pressure is less than the first high-pressure threshold and the second high-pressure threshold is less than the third high-pressure threshold.

[0079] When the first refrigerant pressure is greater than or equal to the third high-pressure threshold and less than the fourth high-pressure threshold, the operating frequency of the compressor is reduced based on the first frequency reduction rate until the first refrigerant pressure is less than the lower limit of the operating frequency of the compressor and the third high-pressure threshold is less than the fourth high-pressure threshold.

[0080] When the first refrigerant pressure is greater than or equal to the fourth high-pressure threshold and less than the fifth high-pressure threshold, the operating frequency of the compressor is reduced based on the second frequency reduction rate until the first refrigerant pressure is less than the lower limit of the operating frequency of the compressor and the fourth high-pressure threshold is less than the fifth high-pressure threshold.

[0081] When the first refrigerant pressure is greater than or equal to the fifth high-pressure threshold, the compressor is controlled to stop.

[0082] In specific implementations, the first high-pressure threshold, the second high-pressure threshold, the third high-pressure threshold, the fourth high-pressure threshold, and the fifth high-pressure threshold are all thresholds determined based on the upper limit of the high-pressure value or the upper limit of the first refrigerant pressure. For example, the first high-pressure threshold can be set to the upper limit of Pd - 0.8, the second high-pressure threshold can be set to the upper limit of Pd - 0.6, the third high-pressure threshold can be set to the upper limit of Pd - 0.45, the fourth high-pressure threshold can be set to the upper limit of Pd - 0.35, and the fifth high-pressure threshold can be set to the upper limit of Pd - 0.2.

[0083] If Pd upper limit -0.8 ≤ Pd current < Pd upper limit -0.6, the frequency increase rate will follow the slow increase rate of the F prevention protection frequency; if Pd current < Pd -0.8, the slow increase control will be discontinued; if Pd upper limit -0.6 ≤ Pd current < Pd upper limit -0.45, the compressor frequency will be limited to prevent excessive operating frequency and compressor damage; frequency limiting control will be discontinued only when Pd current ≤ Pd upper limit -0.8; if Pd upper limit -0.45 ≤ Pd current < Pd upper limit -0.35, the compressor frequency will be adjusted by decreasing by 6Hz every 90s until it reaches the lower frequency limit; if Pd upper limit -0.35 ≤ Pd current < Pd upper limit -0.2, the compressor frequency will be adjusted by decreasing by 30Hz every 90s until it reaches the lower frequency limit; if Pd upper limit -0.2 ≤ Pd current, the refrigeration overload protection will shut down.

[0084] Furthermore, the control method for the air conditioner also includes:

[0085] Obtain the duration of continuous compressor shutdown;

[0086] The compressor is started when the first refrigerant pressure is less than the second high-pressure threshold and the continuous shutdown duration is greater than or equal to the preset duration.

[0087] In the specific implementation, if Pd is currently less than the upper limit of Pd - 0.6, and the compressor has been stopped for 3 minutes, the air conditioner resumes operation and starts the compressor.

[0088] Step S202: When the output performance of the air conditioner decreases, adjust the operating frequency of the air conditioner's compressor according to the control strategy corresponding to the second refrigerant pressure.

[0089] A decrease in the output performance of an air conditioner indicates a reduction in the pressure within the air conditioner and / or the operating frequency of the compressor. In this case, to prevent the low-pressure refrigerant in the air conditioner from exceeding its lower pressure limit, this embodiment can adjust the operating frequency of the air conditioner's compressor according to the control strategy corresponding to the second refrigerant pressure. This can slow down the rate of decrease in the compressor's operating frequency or, when it is about to exceed the limit, increase the compressor's operating frequency to avoid frequent equipment shutdowns.

[0090] Further, adjusting the operating frequency of the air conditioner's compressor according to the control strategy corresponding to the second refrigerant pressure includes:

[0091] When the second refrigerant pressure is greater than or equal to the second low-pressure threshold and less than the first low-pressure threshold, the operating frequency of the compressor is reduced based on a preset frequency reduction strategy until the second refrigerant pressure is less than the first low-pressure threshold and the first low-pressure threshold is greater than the second low-pressure threshold.

[0092] When the second refrigerant pressure is greater than or equal to the third low-pressure threshold and less than the second low-pressure threshold, the operating frequency of the compressor is reduced based on a preset frequency limiting strategy until the second refrigerant pressure is less than the first low-pressure threshold and the second low-pressure threshold is greater than the third low-pressure threshold.

[0093] When the second refrigerant pressure is greater than or equal to the fourth low-pressure threshold and less than the third low-pressure threshold, the compressor operating frequency is increased based on the first frequency reduction rate until the second refrigerant pressure is less than the lower limit of the compressor operating frequency and the third low-pressure threshold is greater than the fourth low-pressure threshold.

[0094] When the second refrigerant pressure is greater than or equal to the fifth low-pressure threshold and less than the fourth low-pressure threshold, the compressor operating frequency is increased based on the second frequency reduction rate until the second refrigerant pressure is less than the lower limit of the compressor operating frequency and the fourth low-pressure threshold is greater than the fifth low-pressure threshold.

[0095] When the pressure of the second refrigerant is less than the fifth low-pressure threshold, the compressor is controlled to stop.

[0096] In practical implementation, the first low-pressure threshold, the second low-pressure threshold, the third low-pressure threshold, the fourth low-pressure threshold, and the fifth low-pressure threshold are all thresholds determined based on the lower limit of low pressure or the lower limit of the first refrigerant pressure. For example, the first low-pressure threshold can be set to Pd lower limit + 0.8, the second low-pressure threshold can be set to Pd lower limit + 0.6, the third low-pressure threshold can be set to Pd lower limit + 0.45, the fourth low-pressure threshold can be set to Pd lower limit + 0.35, and the fifth low-pressure threshold can be set to Pd lower limit + 0.2.

[0097] That is, if Pd lower limit + 0.8 ≤ Pd current < Pd lower limit + 0.6, the frequency reduction speed will be implemented gradually according to the rate corresponding to the F prevention protection frequency; if Pd current < Pd + 0.8, the gradual reduction control will be exited; if Pd lower limit + 0.6 ≤ Pd current < Pd lower limit + 0.45, the compressor frequency limit will be reduced to avoid the operating frequency being too low, causing the air conditioner to shut down; frequency limiting control will only be exited when Pd current ≤ Pd lower limit + 0.8; if Pd lower limit + 0.6 ≤ Pd current < Pd lower limit + 0.45, the compressor frequency limit will be reduced to avoid the operating frequency being too low, causing the air conditioner to shut down; when Pd current ≤ Pd lower limit + 0.8, the frequency limiting control will be exited; if Pd lower limit + 0.6 ≤ Pd current < Pd lower limit + 0.45, the frequency limiting control will be exited. If 0.45 ≤ Pd current < Pd lower limit + 0.35, the compressor frequency will be adjusted by increasing by 6 Hz every 90 seconds until it drops to the lower frequency limit; if Pd lower limit + 0.35 ≤ Pd current < Pd lower limit + 0.2, the compressor frequency will be adjusted by increasing by 30 Hz every 90 seconds until it reaches the low-pressure frequency lower limit, which is the second refrigerant pressure lower limit; if Pd lower limit + 0.2 ≤ Pd current, the heating overload protection will shut down.

[0098] Similarly, in a specific implementation, if Pd is currently less than the lower limit of Pd + 0.6, and the compressor has been off for 3 minutes, the air conditioner will resume operation and start the compressor.

[0099] This embodiment adjusts the compressor's operating frequency according to the control strategy corresponding to the first refrigerant pressure when the air conditioner's output performance increases; and adjusts the compressor's operating frequency according to the control strategy corresponding to the second refrigerant pressure when the air conditioner's output performance decreases. This avoids exceeding the upper limit of the high-pressure refrigerant pressure of the air conditioner when the load is too high and the refrigerant pressure and compressor operating frequency increase, which could damage components in the air conditioner. Furthermore, it can also prevent the air conditioner from shutting down when the load is low and the refrigerant pressure and compressor operating frequency decrease, causing the pressure to fall below the lower limit of the low-pressure refrigerant pressure, thus improving user comfort.

[0100] Based on the second embodiment of this application, in the third embodiment of this application, the content that is the same as or similar to that in the first embodiment described above can be referred to the above description, and will not be repeated hereafter. Based on this, please refer to... Figure 3 Before step S20, the following are also included:

[0101] Step S01: Obtain the current operating frequency of the air conditioner's compressor.

[0102] It should be noted that different current operating frequencies of the compressor correspond to different calculation strategies for the upper limit of high-pressure refrigerant pressure, the upper limit of low-pressure refrigerant pressure, and the lower limit of low-pressure refrigerant pressure, and these generally should not exceed the upper and lower limits of the compressor's rated operating frequency.

[0103] Step S02: Based on the operating frequency range of the current operating frequency, query the corresponding high-pressure threshold set through a preset mapping relationship. The first theoretical upper limit value of the first refrigerant pressure and the second theoretical upper limit value and theoretical lower limit value of the second refrigerant pressure are the first theoretical upper limit value and the second theoretical lower limit value of the first refrigerant pressure.

[0104] In the specific implementation, refer to Figure 4 and Figure 5 The calculation method for the high-voltage operating boundary at each operating frequency is as follows:

[0105]

[0106] The calculation method for the low-voltage operating boundary at each operating frequency is as follows:

[0107]

[0108] Furthermore, the control method for the air conditioner also includes:

[0109] Obtain the rated operating frequency range of the compressor;

[0110] The rated operating frequency range is divided into multiple operating frequency ranges;

[0111] Determine the first theoretical upper limit value and the second theoretical upper limit value and the theoretical lower limit value of the second refrigerant pressure corresponding to each operating frequency range to obtain the preset mapping relationship.

[0112] In the specific implementation, if the operating frequency is too low during the process of frequency and refrigerant pressure decrease, the compressor will stop. In order to meet the user's air conditioner usage needs and avoid frequent start-stop situations, this embodiment adds an upper limit setting for low-pressure refrigerant pressure in the low-pressure determination stage to prevent the air conditioner from switching back and forth between pressure increase and decrease.

[0113] Step S03: Determine the high-pressure threshold set based on the first theoretical upper limit value.

[0114] Step S04: Determine the low-pressure threshold set based on the second theoretical upper limit value and the theoretical lower limit value.

[0115] In specific implementation, the high-pressure threshold set is used to determine the pressure range of the first refrigerant pressure when the output performance of the air conditioner increases, including the first high-pressure threshold, the second high-pressure threshold, the third high-pressure threshold, the fourth high-pressure threshold, and the fifth high-pressure threshold mentioned above; similarly, the low-pressure threshold set is used to determine the pressure range of the second refrigerant pressure when the output performance of the air conditioner decreases, including the upper limit of the second refrigerant pressure and the lower limit of the second refrigerant pressure.

[0116] This embodiment obtains the current operating frequency of the air conditioner's compressor; based on the operating frequency range of the current operating frequency, it queries the corresponding high-pressure threshold set through a preset mapping relationship, which includes the first theoretical upper limit value of the first refrigerant pressure and the second theoretical upper limit value and theoretical lower limit value of the second refrigerant pressure. This provides a higher standard for subsequent high-pressure boundary judgment of the first refrigerant pressure and low-pressure boundary judgment of the second refrigerant pressure, thereby improving the accuracy of air conditioner control and the user experience.

[0117] This application also provides a control device for an air conditioner; please refer to [reference needed]. Figure 6 The control device of the air conditioner includes:

[0118] The acquisition module 10 is used to acquire the changing trend of the air conditioner's output performance and the refrigerant pressure in the air conditioner's refrigerant pipes.

[0119] The adjustment module 20 is used to adjust the operating frequency of the compressor of the air conditioner according to the changing trend of the output performance and the refrigerant pressure.

[0120] In one embodiment, the adjustment module 20 is further configured to adjust the operating frequency of the air conditioner's compressor according to the control strategy corresponding to the first refrigerant pressure when the output performance of the air conditioner increases; and to adjust the operating frequency of the air conditioner's compressor according to the control strategy corresponding to the second refrigerant pressure when the output performance of the air conditioner decreases.

[0121] In one embodiment, the adjustment module 20 is further configured to: when the first refrigerant pressure is greater than or equal to a first high-pressure threshold and less than a second high-pressure threshold, increase the compressor's operating frequency based on a preset frequency-increasing strategy until the first refrigerant pressure is less than the first high-pressure threshold and the first high-pressure threshold is less than the second high-pressure threshold; when the first refrigerant pressure is greater than or equal to the second high-pressure threshold and less than a third high-pressure threshold, increase the compressor's operating frequency based on a preset frequency-limiting strategy until the first refrigerant pressure is less than the first high-pressure threshold and the second high-pressure threshold is less than the third high-pressure threshold; when the first refrigerant pressure is greater than or equal to the third high-pressure threshold and less than a fourth high-pressure threshold, decrease the compressor's operating frequency based on a first frequency-reducing rate until the first refrigerant pressure is less than the compressor's lower operating frequency limit and the third high-pressure threshold is less than the fourth high-pressure threshold; when the first refrigerant pressure is greater than or equal to the fourth high-pressure threshold and less than a fifth high-pressure threshold, decrease the compressor's operating frequency based on a second frequency-reducing rate until the first refrigerant pressure is less than the compressor's lower operating frequency limit and the fourth high-pressure threshold is less than the fifth high-pressure threshold; and when the first refrigerant pressure is greater than or equal to the fifth high-pressure threshold, control the compressor to stop.

[0122] In one embodiment, the adjustment module 20 is further configured to obtain the continuous shutdown duration of the compressor; and to start the compressor when the first refrigerant pressure is less than the second high-pressure threshold and the continuous shutdown duration is greater than or equal to a preset duration.

[0123] In one embodiment, the adjustment module 20 is further configured to: reduce the operating frequency of the compressor based on a preset frequency reduction strategy when the second refrigerant pressure is greater than or equal to a second low-pressure threshold and less than a first low-pressure threshold, until the second refrigerant pressure is less than the first low-pressure threshold and the first low-pressure threshold is greater than the second low-pressure threshold; and reduce the operating frequency of the compressor based on a preset frequency limiting strategy when the second refrigerant pressure is greater than or equal to a third low-pressure threshold and less than the second low-pressure threshold, until the second refrigerant pressure is less than the first low-pressure threshold and the second low-pressure threshold is greater than the third low-pressure threshold; and further configure the adjustment module 20 to: reduce the operating frequency of the compressor based on a preset frequency limiting strategy when the second refrigerant pressure is greater than or equal to a third low-pressure threshold and less than the second low-pressure threshold, until the second refrigerant pressure is less than the first low-pressure threshold and the second low-pressure threshold is greater than the third low-pressure threshold; and further configure the adjustment module 20 to: reduce the operating frequency of the compressor based on a preset frequency limiting strategy when the second refrigerant pressure is greater than or equal to a second low-pressure threshold and less than a first ... greater than or equal to a third low-pressure threshold, until the second refrigerant pressure is greater than or equal to a third low-pressure threshold, until the second refrigerant pressure is greater than or equal to a third low-pressure threshold, until the second refrigerant pressure is greater than or equal to a third low-pressure threshold, until the second refrigerant pressure is greater than or equal to a third low-pressure threshold, until When the second refrigerant pressure is greater than or equal to the fourth low-pressure threshold and less than the third low-pressure threshold, the compressor's operating frequency is increased based on the first frequency reduction rate until the second refrigerant pressure is less than the lower limit of the compressor's operating frequency, and the third low-pressure threshold is greater than the fourth low-pressure threshold; when the second refrigerant pressure is greater than or equal to the fifth low-pressure threshold and less than the fourth low-pressure threshold, the compressor's operating frequency is increased based on the second frequency reduction rate until the second refrigerant pressure is less than the lower limit of the compressor's operating frequency, and the fourth low-pressure threshold is greater than the fifth low-pressure threshold; when the second refrigerant pressure is less than the fifth low-pressure threshold, the compressor is controlled to stop.

[0124] In one embodiment, the adjustment module 20 is further configured to: obtain the current operating frequency of the air conditioner's compressor; query the corresponding high-pressure threshold set according to the operating frequency range of the current operating frequency through a preset mapping relationship, specifying the first theoretical upper limit value of the first refrigerant pressure and the second theoretical upper limit value and theoretical lower limit value of the second refrigerant pressure; determine the high-pressure threshold set according to the first theoretical upper limit value, wherein the high-pressure threshold set is used to determine the pressure range of the first refrigerant pressure when the output performance of the air conditioner increases; and determine the low-pressure threshold set according to the second theoretical upper limit value and the theoretical lower limit value, wherein the low-pressure threshold set is used to determine the pressure range of the second refrigerant pressure when the output performance of the air conditioner decreases.

[0125] In one embodiment, the adjustment module 20 is further configured to obtain the rated operating frequency range of the compressor; divide the rated operating frequency range into multiple operating frequency ranges; determine the first theoretical upper limit value and the second theoretical upper limit value and the theoretical lower limit value of the second refrigerant pressure corresponding to each operating frequency range, and obtain a preset mapping relationship.

[0126] This embodiment obtains the changing trend of the air conditioner's output performance and the refrigerant pressure in the air conditioner's refrigerant pipes; and adjusts the operating frequency of the air conditioner's compressor according to the changing trend of the output performance and the refrigerant pressure. By combining the changing trend of the air conditioner's output performance and the value of the refrigerant pressure, the operating frequency of the air conditioner's compressor is adaptively adjusted to adapt to more complex environments, avoiding the technical problem that the existing air conditioner operation protection scheme cannot adapt to complex environments and has low reliability.

[0127] The air conditioner control device provided in this application, employing the air conditioner control method in the above embodiments, can solve the technical problem of air conditioner control. Compared with the prior art, the beneficial effects of the air conditioner control device provided in this application are the same as those of the air conditioner control method provided in the above embodiments, and other technical features in the air conditioner control device are the same as those disclosed in the methods of the above embodiments, and will not be repeated here.

[0128] This application provides an air conditioner, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, which are executed by the at least one processor to enable the at least one processor to perform the control method of the air conditioner in the first embodiment described above.

[0129] The following is for reference. Figure 7The diagram illustrates a structural schematic of an air conditioner suitable for implementing embodiments of this application. The air conditioner in these embodiments may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. Figure 7 The air conditioner shown is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments of this application.

[0130] like Figure 7 As shown, the air conditioner may include a processing device 1001 (e.g., a central processing unit, a graphics processor, etc.) that can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage device 1003 into a random access memory (RAM) 1004. The RAM 1004 also stores various programs and data required for the operation of the air conditioner. The processing device 1001, ROM 1002, and RAM 1004 are interconnected via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 1006: input devices 1007 including, for example, a touchscreen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), speaker, vibrator, etc.; storage devices 1003 including, for example, magnetic tape, hard disk, etc.; and communication devices 1009. The communication device 1009 allows the air conditioner to communicate wirelessly or wiredly with other devices to exchange data. Although the figure shows an air conditioner with various systems, it should be understood that it is not required to implement or have all of the systems shown. More or fewer systems may be implemented alternatively.

[0131] Specifically, according to the embodiments disclosed in this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments disclosed in this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from storage device 1003, or installed from ROM 1002. When the computer program is executed by processing device 1001, it performs the functions defined in the methods of the embodiments disclosed in this application.

[0132] The air conditioner provided in this application, employing the control method of the air conditioner in the above embodiments, can solve the technical problem of air conditioner control. Compared with the prior art, the beneficial effects of the air conditioner provided in this application are the same as the beneficial effects of the control method of the air conditioner provided in the above embodiments, and other technical features of this air conditioner are the same as those disclosed in the method of the previous embodiment, and will not be repeated here.

[0133] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0134] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0135] This application provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon, the computer-readable program instructions being used to execute the air conditioner control method of the above embodiments.

[0136] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0137] The aforementioned computer-readable storage medium may be included in the air conditioner; or it may exist independently and not be installed in the air conditioner.

[0138] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a Local Area Network (LAN) or a Wide Area Network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0139] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0140] The modules described in the embodiments of this application can be implemented in software or hardware. The names of the modules do not necessarily limit the functionality of the unit itself.

[0141] The readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the control method of the air conditioner described above, and is capable of solving the technical problem of air conditioner control. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as the beneficial effects of the control method of the air conditioner provided in the above embodiments, and will not be repeated here.

[0142] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the air conditioner control method described above.

[0143] The computer program product provided in this application can solve the technical problem of air conditioner control. Compared with the prior art, the beneficial effects of the computer program product provided in this application are the same as the beneficial effects of the air conditioner control method provided in the above embodiments, and will not be repeated here.

[0144] The above description is only a part of the embodiments of this application and does not limit the patent scope of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.

Claims

1. A control method for an air conditioner, characterized in that, The control method for the air conditioner includes: To obtain the changing trend of the air conditioner's output performance and the refrigerant pressure in the air conditioner's refrigerant pipes; The operating frequency of the air conditioner compressor is adjusted according to the changing trend of the output performance and the refrigerant pressure. The refrigerant pressure includes a first refrigerant pressure and a second refrigerant pressure. The first refrigerant pressure is the pressure value before refrigerant throttling, and the second refrigerant pressure is the pressure value after refrigerant throttling. The steps to obtain the trend of changes in the output performance of an air conditioner include: Obtain the set load and actual output performance of the air conditioner; The trend of output performance variation is determined based on the set load and actual output performance. The step of adjusting the operating frequency of the air conditioner's compressor based on the changing trend of the output performance and the refrigerant pressure includes: When the output performance of the air conditioner increases, the operating frequency of the air conditioner's compressor is adjusted according to the control strategy corresponding to the first refrigerant pressure; When the output performance of the air conditioner decreases, the operating frequency of the air conditioner's compressor is adjusted according to the control strategy corresponding to the second refrigerant pressure. The step of adjusting the operating frequency of the air conditioner's compressor according to the control strategy corresponding to the first refrigerant pressure includes: When the first refrigerant pressure is greater than or equal to the first high-pressure threshold and less than the second high-pressure threshold, the operating frequency of the compressor is increased based on a preset frequency increase strategy until the first refrigerant pressure is less than the first high-pressure threshold and the first high-pressure threshold is less than the second high-pressure threshold. When the first refrigerant pressure is greater than or equal to the second high-pressure threshold and less than the third high-pressure threshold, the operating frequency of the compressor is increased based on a preset frequency limiting strategy until the first refrigerant pressure is less than the first high-pressure threshold and the second high-pressure threshold is less than the third high-pressure threshold. When the first refrigerant pressure is greater than or equal to the third high-pressure threshold and less than the fourth high-pressure threshold, the operating frequency of the compressor is reduced based on the first frequency reduction rate until the first refrigerant pressure is less than the lower limit of the operating frequency of the compressor and the third high-pressure threshold is less than the fourth high-pressure threshold. When the first refrigerant pressure is greater than or equal to the fourth high-pressure threshold and less than the fifth high-pressure threshold, the operating frequency of the compressor is reduced based on the second frequency reduction rate until the first refrigerant pressure is less than the lower limit of the operating frequency of the compressor and the fourth high-pressure threshold is less than the fifth high-pressure threshold. When the first refrigerant pressure is greater than or equal to the fifth high-pressure threshold, the compressor is controlled to stop. The step of adjusting the operating frequency of the air conditioner's compressor according to the control strategy corresponding to the second refrigerant pressure includes: When the second refrigerant pressure is greater than or equal to the second low-pressure threshold and less than the first low-pressure threshold, the operating frequency of the compressor is reduced based on a preset frequency reduction strategy until the second refrigerant pressure is less than the first low-pressure threshold and the first low-pressure threshold is greater than the second low-pressure threshold. When the second refrigerant pressure is greater than or equal to the third low-pressure threshold and less than the second low-pressure threshold, the operating frequency of the compressor is reduced based on a preset frequency limiting strategy until the second refrigerant pressure is less than the first low-pressure threshold and the second low-pressure threshold is greater than the third low-pressure threshold. When the second refrigerant pressure is greater than or equal to the fourth low-pressure threshold and less than the third low-pressure threshold, the compressor operating frequency is increased based on the first frequency reduction rate until the second refrigerant pressure is less than the lower limit of the compressor operating frequency and the third low-pressure threshold is greater than the fourth low-pressure threshold. When the second refrigerant pressure is greater than or equal to the fifth low-pressure threshold and less than the fourth low-pressure threshold, the compressor operating frequency is increased based on the second frequency reduction rate until the second refrigerant pressure is less than the lower limit of the compressor operating frequency and the fourth low-pressure threshold is greater than the fifth low-pressure threshold. When the pressure of the second refrigerant is less than the fifth low-pressure threshold, the compressor is controlled to stop.

2. The control method for an air conditioner as described in claim 1, characterized in that, The control method for the air conditioner further includes: Obtain the duration of continuous compressor shutdown; The compressor is started when the first refrigerant pressure is less than the second high-pressure threshold and the continuous shutdown duration is greater than or equal to the preset duration.

3. The control method for an air conditioner as described in claim 1 or 2, characterized in that, Before adjusting the operating frequency of the air conditioner's compressor based on the changing trend of the output performance and the refrigerant pressure, the method further includes: Obtain the current operating frequency of the air conditioner's compressor; Based on the operating frequency range of the current operating frequency, the first theoretical upper limit value of the first refrigerant pressure and the second theoretical upper limit value and theoretical lower limit value of the second refrigerant pressure are queried through a preset mapping relationship; A set of high-pressure thresholds is determined based on the first theoretical upper limit value. The set of high-pressure thresholds is used to determine the pressure range of the first refrigerant pressure when the output performance of the air conditioner increases. A set of low-pressure thresholds is determined based on the second theoretical upper limit and the theoretical lower limit. The set of low-pressure thresholds is used to determine the pressure range of the second refrigerant pressure when the output performance of the air conditioner decreases.

4. The control method for an air conditioner as described in claim 1, characterized in that, The control method for the air conditioner further includes: Obtain the rated operating frequency range of the compressor; The rated operating frequency range is divided into multiple operating frequency ranges; Determine the first theoretical upper limit value and the second theoretical upper limit value and the theoretical lower limit value of the second refrigerant pressure corresponding to each operating frequency range to obtain the preset mapping relationship.

5. A control device for an air conditioner, characterized in that, The control device for the air conditioner is for implementing the control method of the air conditioner as described in any one of claims 1 to 4, and the control device for the air conditioner includes: The acquisition module is used to acquire the changing trend of the air conditioner's output performance and the refrigerant pressure in the air conditioner's refrigerant pipes. The adjustment module is used to adjust the operating frequency of the compressor of the air conditioner according to the changing trend of the output performance and the refrigerant pressure, wherein the refrigerant pressure includes a first refrigerant pressure and a second refrigerant pressure, the first refrigerant pressure being the pressure value before refrigerant throttling, and the second refrigerant pressure being the pressure value after refrigerant throttling; The acquisition module is used to acquire the set load and actual output performance of the air conditioner; and to determine the trend of output performance change based on the set load and actual output performance. The adjustment module is further configured to adjust the operating frequency of the air conditioner's compressor according to the control strategy corresponding to the first refrigerant pressure when the output performance of the air conditioner increases; and to adjust the operating frequency of the air conditioner's compressor according to the control strategy corresponding to the second refrigerant pressure when the output performance of the air conditioner decreases. The adjustment module is further configured to: when the first refrigerant pressure is greater than or equal to a first high-pressure threshold and less than a second high-pressure threshold, increase the compressor's operating frequency based on a preset frequency-increasing strategy until the first refrigerant pressure is less than the first high-pressure threshold and the first high-pressure threshold is less than the second high-pressure threshold; when the first refrigerant pressure is greater than or equal to the second high-pressure threshold and less than a third high-pressure threshold, increase the compressor's operating frequency based on a preset frequency-limiting strategy until the first refrigerant pressure is less than the first high-pressure threshold and the second high-pressure threshold is less than the third high-pressure threshold; when the first refrigerant pressure is greater than or equal to the third high-pressure threshold and less than a fourth high-pressure threshold, decrease the compressor's operating frequency based on a first frequency-reducing rate until the first refrigerant pressure is less than the compressor's lower operating frequency limit and the third high-pressure threshold is less than the fourth high-pressure threshold; when the first refrigerant pressure is greater than or equal to the fourth high-pressure threshold and less than a fifth high-pressure threshold, decrease the compressor's operating frequency based on a second frequency-reducing rate until the first refrigerant pressure is less than the compressor's lower operating frequency limit and the fourth high-pressure threshold is less than the fifth high-pressure threshold; and when the first refrigerant pressure is greater than or equal to the fifth high-pressure threshold, control the compressor to stop. The adjustment module is further configured to: when the second refrigerant pressure is greater than or equal to a second low-pressure threshold and less than a first low-pressure threshold, reduce the compressor's operating frequency based on a preset frequency reduction strategy until the second refrigerant pressure is less than the first low-pressure threshold and the first low-pressure threshold is greater than the second low-pressure threshold; when the second refrigerant pressure is greater than or equal to a third low-pressure threshold and less than the second low-pressure threshold, reduce the compressor's operating frequency based on a preset frequency limiting strategy until the second refrigerant pressure is less than the first low-pressure threshold and the second low-pressure threshold is greater than the third low-pressure threshold; when the second refrigerant pressure is greater than or equal to a fourth low-pressure threshold and less than the third low-pressure threshold, increase the compressor's operating frequency based on a first frequency reduction rate until the second refrigerant pressure is less than the compressor's lower operating frequency limit and the third low-pressure threshold is greater than the fourth low-pressure threshold; when the second refrigerant pressure is greater than or equal to a fifth low-pressure threshold and less than the fourth low-pressure threshold, increase the compressor's operating frequency based on a second frequency reduction rate until the second refrigerant pressure is less than the compressor's lower operating frequency limit and the fourth low-pressure threshold is greater than the fifth low-pressure threshold; and control the compressor to stop when the second refrigerant pressure is less than the fifth low-pressure threshold.

6. An air conditioner, characterized in that, The air conditioner includes: a memory, a processor, and a control program for the air conditioner stored in the memory and executable on the processor, the control program being configured to implement the control method for the air conditioner as described in any one of claims 1 to 4.

7. A storage medium, characterized in that, The storage medium stores a control program for an air conditioner, which, when executed by a processor, implements the control method for an air conditioner as described in any one of claims 1 to 4.

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