Air conditioner control method and device, air conditioner and storage medium

Abstract

The invention relates to the technical field of air conditioners, in particular to a control method and device of an air conditioner, the air conditioner and a storage medium. The shortest operation duration from starting to stopping of the air conditioner is determined by combining the outdoor environment temperature of the environment where an outdoor unit of the air conditioner is located with the current operation mode of the air conditioner, so that a compressor is not required to be started before stopping; the air conditioner runs for enough long time, so that stable pressure circulation is established in the refrigerant pipeline in the air conditioner, the lubricating oil is prevented from being reversely pumped, and the technical problem that in the prior art, an air conditioner is shut down under the condition that the pressure difference is large or the oil temperature is insufficient, and consequently a compressor rotates reversely is solved.

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] If the compressor in an air conditioner starts up in a short time and then stops when the pressure difference is large or the oil temperature is insufficient, the compressor will reverse. This will cause the lubricating oil in the compressor oil sump to be quickly drawn back into the gas-liquid separator, affecting the compressor's service life and operating performance.

[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 the compressor reverses when the existing air conditioner stops operating under conditions of large pressure difference or insufficient oil temperature.

[0005] To achieve the above objectives, the present invention provides a control method for an air conditioner, the air conditioner including a heat pump circuit and an enthalpy-increasing circuit, the heat pump circuit including an outdoor unit and an indoor unit, the outdoor unit including a compressor, a four-way valve, a gas-liquid separator, a throttling element, a first outdoor heat exchanger and a second outdoor heat exchanger, the indoor unit including at least one indoor heat exchanger, one end of the enthalpy-increasing circuit being connected to the second outdoor heat exchanger and the other end being connected to the enthalpy injection port of the compressor;

[0006] The method includes the following steps:

[0007] When the air conditioner receives a shutdown command during operation, the outdoor ambient temperature of the environment where the outdoor unit of the air conditioner is located, the current operating mode of the air conditioner, and the duration of continuous operation are obtained.

[0008] The shortest operating time of the air conditioner is determined based on the current operating mode and the outdoor ambient temperature. The shortest operating time is the theoretical shortest operating time from the start of the air conditioner to the first shutdown.

[0009] When the continuous running time is greater than or equal to the shortest running time, the compressor is controlled to stop.

[0010] Optionally, determining the shortest operating time of the air conditioner based on the current operating mode and the outdoor ambient temperature includes:

[0011] When the current operating mode is cooling mode, the indoor ambient temperature and target set temperature of the environment where the indoor unit of the air conditioner is located are obtained;

[0012] When the temperature difference between the indoor ambient temperature and the target set temperature is greater than a preset threshold, and the outdoor ambient temperature is greater than or equal to a first temperature threshold, the shortest operating time of the air conditioner is determined to be the first duration.

[0013] When the outdoor ambient temperature is less than a first temperature threshold, the shortest operating time of the air conditioner is determined to be a second duration, which is greater than the first duration.

[0014] Optionally, the control method for the air conditioner further includes:

[0015] When the current operating mode is heating mode and the outdoor ambient temperature is less than the second temperature threshold, the shortest operating time of the air conditioner is determined to be the third duration.

[0016] When the current operating mode is heating mode, and the outdoor ambient temperature is greater than or equal to the second temperature threshold and less than the third temperature threshold, the shortest operating time of the air conditioner is determined to be the fourth duration, where the third temperature threshold is greater than the second temperature threshold and the fourth duration is less than the third duration.

[0017] When the current operating mode is heating mode and the outdoor ambient temperature is greater than or equal to the third temperature threshold, the shortest operating time of the air conditioner is determined to be the fifth duration, which is less than the fourth duration.

[0018] Optionally, controlling the compressor to stop includes:

[0019] Obtain the operating frequency of the compressor;

[0020] The set frequency is determined based on the outdoor ambient temperature.

[0021] When the operating frequency is less than or equal to the set frequency, the operating frequency of the compressor is reduced until the compressor stops.

[0022] Optionally, the control method for the air conditioner further includes:

[0023] When the operating frequency is greater than the set frequency, the operating frequency of the compressor is reduced to the set frequency;

[0024] After a six-hour interval, the operating frequency of the compressor is reduced until the compressor stops.

[0025] Optionally, determining the set frequency based on the outdoor ambient temperature includes:

[0026] When the outdoor ambient temperature is less than the second temperature threshold, the set frequency is determined to be the first frequency;

[0027] When the ambient temperature is greater than or equal to the second temperature threshold, the set frequency is determined to be the second frequency, which is greater than the first frequency.

[0028] Optionally, the control method for the air conditioner further includes:

[0029] When the continuous running time is less than the minimum running time, the current operating state of the air conditioner is maintained unchanged until the continuous running time is greater than or equal to the minimum running time.

[0030] Furthermore, to achieve the above objectives, the present invention also proposes a control device for an air conditioner, the control device comprising:

[0031] The acquisition module is used to acquire the outdoor ambient temperature of the environment where the outdoor unit of the air conditioner is located, the current operating mode of the air conditioner, and the continuous operating time when the air conditioner receives a shutdown command during operation.

[0032] The determination module is used to determine the shortest operating time of the air conditioner based on the current operating mode and the outdoor ambient temperature. The shortest operating time is the theoretical shortest operating time from the start-up of the air conditioner to the first shutdown.

[0033] The control module is used to control the compressor to stop when the continuous running time is greater than or equal to the shortest running time.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] One or more technical solutions proposed in this application have at least the following technical effects: When the air conditioner receives a shutdown command during operation, the present invention obtains the outdoor ambient temperature of the environment where the outdoor unit of the air conditioner is located, the current operating mode of the air conditioner, and the continuous operating time; determines the shortest operating time of the air conditioner based on the current operating mode and the outdoor ambient temperature, wherein the shortest operating time is the theoretical shortest operating time from the start-up of the air conditioner to the first shutdown; when the continuous operating time is greater than or equal to the shortest operating time, controls the compressor to shut down. By determining the shortest operating time from start-up to shutdown of the air conditioner by combining the outdoor ambient temperature of the outdoor unit of the air conditioner with the current operating mode of the air conditioner, the air conditioner runs for a sufficiently long time before the compressor shuts down, allowing a stable pressure circulation to be established in the refrigerant pipeline of the air conditioner, preventing the lubricating oil from being drawn back, and avoiding the technical problem in the prior art where the air conditioner shuts down when the pressure difference is large or the oil temperature is insufficient, which would cause the compressor to reverse. Attached Figure Description

[0038] 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.

[0039] 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.

[0040] Figure 1 This is a flowchart illustrating the first embodiment of the control method for an air conditioner according to the present invention;

[0041] Figure 2 This is a schematic diagram of the air conditioner architecture according to an embodiment of the control method of the air conditioner of the present invention;

[0042] Figure 3 This is a flowchart illustrating the second embodiment of the control method for an air conditioner according to the present invention;

[0043] Figure 4 This is a structural block diagram of the first embodiment of the control device for the air conditioner of the present invention;

[0044] Figure 5 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.

[0045] Explanation of icon numbers:

[0046]

[0047]

[0048] 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

[0049] 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.

[0050] 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.

[0051] The main solution of this application embodiment is: when the air conditioner receives a shutdown command during operation, the outdoor ambient temperature of the environment where the outdoor unit of the air conditioner is located, the current operating mode of the air conditioner, and the continuous operating time are obtained; the shortest operating time of the air conditioner is determined according to the current operating mode and the outdoor ambient temperature, the shortest operating time being the theoretical shortest operating time from the start of the air conditioner to the first shutdown; when the continuous operating time is greater than or equal to the shortest operating time, the compressor is controlled to stop.

[0052] 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.

[0053] To prevent the compressor from reversing and causing lubricating oil to be drawn back into the gas-liquid separator, current technology typically reduces the amount of oil drawn back into the gas separator by decreasing the oil return port of the compressor. However, when the reversal is rapid, lubricating oil will still be sprayed out from the suction pipe. This cannot fundamentally solve the technical problem that the compressor will reverse when the air conditioner stops due to a large pressure difference or insufficient oil temperature.

[0054] This application provides a solution that determines the shortest operating time from start-up to shutdown of the air conditioner by combining the outdoor ambient temperature of the air conditioner's outdoor unit with the air conditioner's current operating mode. This ensures that the air conditioner runs long enough before the compressor stops, allowing the refrigerant pipes in the air conditioner to establish a stable pressure circulation, preventing the lubricating oil from being drawn back. This avoids the technical problem in existing air conditioners where the compressor reverses when the air conditioner stops under conditions of large pressure difference or insufficient oil temperature.

[0055] 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 a tablet computer, personal computer, or mobile phone, or an electronic device capable of performing the above functions, such as an air conditioner controller. The following description uses the control of an air conditioner as an example to illustrate this embodiment and the subsequent embodiments.

[0056] 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.

[0057] In this embodiment, the control method for the air conditioner includes:

[0058] Step S10: When the air conditioner receives a shutdown command during operation, obtain the outdoor ambient temperature of the environment where the outdoor unit of the air conditioner is located, the current operating mode of the air conditioner, and the continuous operating time.

[0059] 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.

[0060] If the compressor is running, due to the influence of the compressor rotor, even if there is a pressure difference between the compressor's discharge port and suction port, it is much smaller than the output pressure generated by the compressor's operation, and there will be no reverse rotation. However, if the compressor's start-up time is short, because the refrigerant pipeline of the entire air conditioner has not established a relatively stable pressure environment, if the compressor stops at this time, there will be a pressure difference between the compressor's discharge port and suction port. If the oil viscosity in the pipeline is low at this time, it may cause the compressor to reverse, which will lead to oil migration. This will cause the rotor to reverse and accelerate the oil pump's oil sump discharge.

[0061] It should be noted that the reference Figure 2 The air conditioner includes a heat pump circuit and an enthalpy-increasing circuit. The heat pump circuit includes an outdoor unit and an indoor unit. The outdoor unit A includes a compressor A1, a four-way valve A2, a gas-liquid separator A3, a throttling element A4, a first outdoor heat exchanger A5, and a second outdoor heat exchanger A6. A balancing solenoid valve is also provided between the exhaust port of the compressor and the gas-liquid separator. The indoor unit includes at least one indoor heat exchanger. One end of the enthalpy-increasing circuit is connected to the second outdoor heat exchanger, and the other end is connected to the enthalpy injection port of the compressor.

[0062] In this embodiment, the second outdoor heat exchanger can be configured as a plate heat exchanger to improve the heat exchange efficiency of the enthalpy-increasing loop.

[0063] Furthermore, a one-way valve can be installed at the compressor's discharge port, allowing refrigerant to be transferred from the compressor's discharge port to the four-way valve via the one-way valve. In the event of compressor reversal, this can also prevent the high-temperature, high-pressure refrigerant from flowing back into the condenser, thereby reducing the refrigerant pressure at the compressor's discharge port.

[0064] The balancing solenoid valve is connected to the compressor's intake port at one end and to the compressor's exhaust port at the other end. It is mainly used to balance the pressure at the intake port and the exhaust port after the compressor stops, so as to avoid pressure imbalance and cause the compressor to reverse.

[0065] The current operating modes of the air conditioner include, but are not limited to, heating mode, cooling mode, and dehumidification mode. For ease of explanation, since there are only two flow directions of the refrigerant in the air conditioner, one is to pass through the outdoor heat exchanger first and then through the indoor heat exchanger, and the other is to pass through the indoor heat exchanger first and then through the outdoor heat exchanger, this embodiment and subsequent embodiments will use heating mode and cooling mode as examples.

[0066] The continuous operating time can be the duration of operation from when the air conditioner is turned on until its first shutdown. For example, if the air conditioner is turned on at 9:00, turned off at 10:00, restarted at 10:15, and turned off again at 11:00, the continuous operating time is divided into two parts: the first part is one hour from 9:00 to 10:00, and the second part is 45 minutes from 10:15 to 11:00. The continuous operating time can also be the operating time from when the air conditioner is turned on to the current operating moment.

[0067] Step S20: Determine the shortest operating time of the air conditioner based on the current operating mode and the outdoor ambient temperature.

[0068] It is understandable that, since the refrigerant piping of the entire air conditioner does not establish a relatively stable pressure environment, if the compressor stops at this time, there will be a pressure difference between the compressor's discharge port and suction port. If the oil viscosity in the piping is low at this time, it may cause the compressor to reverse, which may lead to oil migration and cause the rotor to reverse and accelerate the oil pump to exit the oil sump. Therefore, this embodiment improves the pressure stability of the refrigerant piping in the air conditioner by limiting the shortest operating time of the air conditioner.

[0069] The shortest operating time is the theoretical shortest operating time from when the air conditioner is turned on to when it first stops.

[0070] In practical implementation, another factor affecting the backflow of lubricating oil is oil viscosity, which is related to the temperature. The refrigerant flow direction of an air conditioner varies under different operating environments, and the temperature on the condenser side also varies. For example, in heating mode, the indoor heat exchanger acts as the condenser, but generally, heating mode operates at a lower ambient temperature. In cooling mode, the outdoor heat exchanger acts as the condenser, but generally, cooling mode operates at a higher ambient temperature. Consequently, when the air conditioner is shut down, the ambient temperature of the compressor's lubricating oil varies, which in turn affects the oil viscosity. Therefore, this application determines the shortest operating time of the air conditioner by comprehensively considering the operating mode of the air conditioner before shutdown and the outdoor ambient temperature of the compressor's location, thereby reducing the possibility of lubricating oil backflow.

[0071] Further, determining the shortest operating time of the air conditioner based on the current operating mode and the outdoor ambient temperature includes:

[0072] When the current operating mode is cooling mode, the indoor ambient temperature and target set temperature of the environment where the indoor unit of the air conditioner is located are obtained;

[0073] When the temperature difference between the indoor ambient temperature and the target set temperature is greater than a preset threshold, and the outdoor ambient temperature is greater than or equal to a first temperature threshold, the shortest operating time of the air conditioner is determined to be the first duration.

[0074] When the outdoor ambient temperature is less than a first temperature threshold, the shortest operating time of the air conditioner is determined to be a second duration, which is greater than the first duration.

[0075] In the specific implementation, refer to Figure 2 , Figure 2 This is a schematic diagram of the control logic in this embodiment. If the air conditioner is running in cooling mode, considering that the air conditioner's shutdown command may be issued based on the air conditioner being in a state of reaching the set temperature and then stopping, if the difference between the indoor ambient temperature and the set indoor temperature is small, the air conditioner may still be running in cooling mode even after reaching the set temperature, causing the indoor temperature to continue to drop and affecting the user experience. Therefore, in this embodiment, when the outdoor ambient temperature is high, it is also necessary to detect the temperature difference between the indoor ambient temperature and the target set temperature. That is, when the temperature difference between the indoor ambient temperature and the target set temperature is greater than a preset threshold, and the outdoor ambient temperature is greater than or equal to a first temperature threshold, the shortest running time of the air conditioner is determined as the first duration. The preset threshold can be 2℃, the first temperature threshold can be 18℃, and the first duration is in the range of (3min, 5min). That is, if before shutdown, ΔT = T1 - Ts ≥ 2℃ and T4 ≥ 18℃, the shortest running time tc2min is set (3 ≤ tc2min ≤ 5).

[0076] If the outdoor ambient temperature is less than the first temperature threshold, the shortest running time of the air conditioner is determined to be the second duration, which is longer than the first duration. That is, in cooling mode, if ΔT = T1 - Ts < 2℃ and T4 < 18℃ before shutdown, the shortest running time tc1min is set (6 ≤ tc1min ≤ 8).

[0077] Furthermore, if the air conditioner is operating in heating mode, the shortest operating time is determined directly based on the outdoor ambient temperature. Specifically, if the outdoor ambient temperature T4 > the second temperature threshold of 15℃, the shortest operating time is controlled according to the third duration, with a value range of 3 ≤ t ≤ 5. If the outdoor ambient temperature is between -2℃ and 15℃, i.e., -2 ≤ T4 ≤ 15℃, the shortest operating time is controlled according to the fourth duration, with a value range of 5 min and 7 min, i.e., 5 ≤ t ≤ 7 min. If the outdoor ambient temperature is between T4 and the third temperature threshold of -2℃, the shortest operating time is controlled according to the fifth duration, with a value range of 8 min and 10 min, i.e., 8 ≤ t < 10 min. The above duration and ambient temperature values ​​are only illustrative examples and can be adjusted adaptively in actual applications. This embodiment does not impose specific limitations on these values.

[0078] Step S30: When the continuous running time is greater than or equal to the shortest running time, control the compressor to stop.

[0079] In practice, if the continuous running time of the air conditioner after startup is greater than or equal to the set minimum running time, it means that a stable pressure circuit may have been established in the refrigerant pipeline of the air conditioner. The possibility of the compressor reversing and the lubricating oil being drawn back is small. At this time, the compressor can be controlled to stop according to the shutdown command.

[0080] Furthermore, when the continuous operating time is less than the shortest operating time, the current operating state of the air conditioner is maintained unchanged until the continuous operating time is greater than or equal to the shortest operating time.

[0081] If the continuous running time of the air conditioner after startup is less than the set minimum running time, the compressor will stop, causing the rotor to reverse and the lubricating oil to be drawn back. In this case, the current operating state of the air conditioner can be maintained until the continuous running time is greater than or equal to the minimum running time, and then the compressor will be stopped.

[0082] This embodiment determines the shortest operating time from start-up to shutdown of the air conditioner by combining the outdoor ambient temperature of the air conditioner's outdoor unit with the air conditioner's current operating mode. This ensures that the air conditioner runs long enough before the compressor stops, allowing the refrigerant pipes in the air conditioner to establish a stable pressure circulation. This prevents the lubricating oil from being drawn back and avoids the technical problem in existing air conditioners where the compressor reverses when the air conditioner stops under conditions of large pressure difference or insufficient oil temperature.

[0083] 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 3 Step S30 includes:

[0084] Step S301: Obtain the operating frequency of the compressor.

[0085] It should be noted that if the compressor operates at too high a frequency when controlling the compressor to stop, it may cause excessive changes in the compressor's rotor speed and pressure difference in a short period of time, resulting in equipment damage. Therefore, in the process of controlling the compressor to stop, this embodiment can also control the operating status of the air conditioner based on the compressor's operating frequency to avoid equipment damage.

[0086] Step S302: Determine the set frequency based on the outdoor ambient temperature.

[0087] It is understandable that outdoor ambient temperature has a certain impact on the output performance of air conditioners. For example, in heating mode, the outdoor heat exchanger is used as an evaporator. However, if the outdoor ambient temperature is low, the heat exchange capacity of the refrigerant in the outdoor heat exchanger will be low, resulting in poor refrigerant evaporation. In order to improve the heating output of the air conditioner, the operating frequency of the compressor can be appropriately increased, thereby improving the heating output capacity of the air conditioner.

[0088] To avoid excessive differences between pressure differential and rotor speed during compressor shutdown, this embodiment can set a set frequency based on the outdoor ambient temperature. If the compressor operates at a high frequency before shutdown, it can first reduce the frequency to the set frequency for a period of time before shutdown, thereby reducing the rate of pressure differential change.

[0089] Further, determining the set frequency based on the outdoor ambient temperature includes:

[0090] When the outdoor ambient temperature is less than the second temperature threshold, the set frequency is determined to be the first frequency;

[0091] When the ambient temperature is greater than or equal to the second temperature threshold, the set frequency is determined to be the second frequency, which is greater than the first frequency.

[0092] In a specific implementation, the second temperature threshold can be set to -2℃, the first frequency can be set to 16-20Hz, and the second frequency can be set to 45-55Hz. This embodiment does not impose any specific restrictions on these.

[0093] Step S303: When the operating frequency is less than or equal to the set frequency, reduce the operating frequency of the compressor until the compressor stops.

[0094] For ease of explanation, let's take a first frequency of 20Hz and a second frequency of 55Hz as an example. If the outdoor ambient temperature is less than -2℃, when the compressor's operating frequency is less than 20Hz, the compressor will stop directly when it receives a stop command. When the compressor's operating frequency is greater than or equal to 20Hz, when the compressor receives a stop command, it will reduce or maintain at 20Hz, and after a period of time, it will reduce from 20Hz to stop.

[0095] Similarly, when the outdoor ambient temperature is less than -2℃, and the compressor's operating frequency is less than 20Hz, the compressor will stop directly when it receives a stop command. When the compressor's operating frequency is greater than or equal to 55Hz, the compressor will reduce or maintain at 55Hz when it receives a stop command, and after a period of time, it will reduce from 55Hz to stop.

[0096] Furthermore, the control method for the air conditioner also includes:

[0097] When the operating frequency is greater than the set frequency, the operating frequency of the compressor is reduced to the set frequency;

[0098] After a six-hour interval, the operating frequency of the compressor is reduced until the compressor stops.

[0099] It should be understood that when the compressor's operating frequency is too high, the purpose of maintaining the compressor's operating frequency at the set frequency for a period of time during the shutdown process is to reduce the rate of change of the compressor's rotor speed and the rate of change of the pressure difference. The sixth time can be set to 30-90 seconds. Taking the heating mode as an example, when the outdoor ambient temperature is less than -2℃, the shortest running time of the air conditioner is 8-12 minutes. After this shortest running time, if the compressor's operating frequency is 60Hz, during the air conditioner's shutdown process, the compressor's operating frequency will first be reduced to 20Hz and maintained for 30-90 seconds, and then the compressor's operating frequency will be reduced until the air conditioner stops.

[0100] This embodiment obtains the operating frequency of the compressor; determines a set frequency based on the outdoor ambient temperature; and reduces the operating frequency of the compressor when the operating frequency is less than or equal to the set frequency until the compressor stops. By determining the set frequency based on the outdoor ambient temperature, the operating frequency of the compressor before shutdown is not too high, which could lead to excessive pressure difference change rate or excessive rotor speed change, thereby improving the service life of the equipment.

[0101] This application also provides a control device for an air conditioner; please refer to [reference needed]. Figure 4 The control device of the air conditioner includes:

[0102] The acquisition module 10 is used to acquire the outdoor ambient temperature of the environment where the outdoor unit of the air conditioner is located, the current operating mode of the air conditioner, and the continuous operating time when the air conditioner receives a shutdown command during operation.

[0103] The determining module 20 is used to determine the shortest operating time of the air conditioner based on the current operating mode and the outdoor ambient temperature. The shortest operating time is the theoretical shortest operating time from the start-up of the air conditioner to the first shutdown.

[0104] Control module 30 is used to control the compressor to stop when the continuous running time is greater than or equal to the shortest running time.

[0105] In one embodiment, the determining module 20 is configured to: when the current operating mode is cooling mode, acquire the indoor ambient temperature and the target set temperature of the environment where the indoor unit of the air conditioner is located; when the temperature difference between the indoor ambient temperature and the target set temperature is greater than a preset threshold and the outdoor ambient temperature is greater than or equal to a first temperature threshold, determine the shortest operating time of the air conditioner as a first duration; when the outdoor ambient temperature is less than the first temperature threshold, determine the shortest operating time of the air conditioner as a second duration, wherein the second duration is greater than the first duration.

[0106] In one embodiment, the determining module 20 is configured to: determine a third duration for the shortest operating time of the air conditioner when the current operating mode is heating mode and the outdoor ambient temperature is less than a second temperature threshold; determine a fourth duration for the shortest operating time of the air conditioner when the current operating mode is heating mode and the outdoor ambient temperature is greater than or equal to the second temperature threshold and less than the third temperature threshold, wherein the third temperature threshold is greater than the second temperature threshold and the fourth duration is less than the third duration; and determine a fifth duration for the shortest operating time of the air conditioner when the current operating mode is heating mode and the outdoor ambient temperature is greater than or equal to the third temperature threshold, wherein the fifth duration is less than the fourth duration.

[0107] In one embodiment, the control module 30 is configured to acquire the operating frequency of the compressor; determine a set frequency based on the outdoor ambient temperature; and reduce the operating frequency of the compressor until the compressor stops when the operating frequency is less than or equal to the set frequency.

[0108] In one embodiment, the control module 30 is configured to reduce the operating frequency of the compressor to the set frequency when the operating frequency is greater than the set frequency; and after a sixth time interval, reduce the operating frequency of the compressor until the compressor stops.

[0109] In one embodiment, the control module 30 is configured to determine the set frequency as a first frequency when the outdoor ambient temperature is less than a second temperature threshold; and to determine the set frequency as a second frequency when the outdoor ambient temperature is greater than or equal to the second temperature threshold, wherein the second frequency is greater than the first frequency.

[0110] In one embodiment, the control module 30 is configured to maintain the current operating state of the air conditioner unchanged when the continuous operating time is less than the shortest operating time.

[0111] This embodiment determines the shortest operating time from start-up to shutdown of the air conditioner by combining the outdoor ambient temperature of the air conditioner's outdoor unit with the air conditioner's current operating mode. This ensures that the air conditioner runs long enough before the compressor stops, allowing the refrigerant pipes in the air conditioner to establish a stable pressure circulation. This prevents the lubricating oil from being drawn back and avoids the technical problem in existing air conditioners where the compressor reverses when the air conditioner stops under conditions of large pressure difference or insufficient oil temperature.

[0112] 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.

[0113] 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.

[0114] The following is for reference. Figure 5The 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 5 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.

[0115] like Figure 5 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.

[0116] 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.

[0117] 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.

[0118] 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.

[0119] 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.

[0120] 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.

[0121] 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.

[0122] 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.

[0123] The aforementioned computer-readable storage medium carries one or more programs that, when executed by the air conditioner, cause the air conditioner to control itself.

[0124] 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).

[0125] 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.

[0126] 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.

[0127] 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.

[0128] 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.

[0129] 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.

[0130] 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 air conditioner includes a heat pump circuit and an enthalpy-increasing circuit. The heat pump circuit includes an outdoor unit and an indoor unit. The outdoor unit includes a compressor, a four-way valve, a gas-liquid separator, a throttling element, a first outdoor heat exchanger, and a second outdoor heat exchanger. The indoor unit includes at least one indoor heat exchanger. One end of the enthalpy-increasing circuit is connected to the second outdoor heat exchanger, and the other end is connected to the enthalpy injection port of the compressor. The control method for the air conditioner includes: When the air conditioner receives a shutdown command during operation, the outdoor ambient temperature of the environment where the outdoor unit of the air conditioner is located, the current operating mode of the air conditioner, and the duration of continuous operation are obtained. The shortest operating time of the air conditioner is determined based on the current operating mode and the outdoor ambient temperature. This shortest operating time is the theoretical shortest operating time from the moment the air conditioner is turned on until its first shutdown. When the continuous running time is greater than or equal to the shortest running time, the compressor is controlled to stop.

2. The control method for an air conditioner as described in claim 1, characterized in that, Determining the shortest operating time of the air conditioner based on the current operating mode and the outdoor ambient temperature includes: When the current operating mode is cooling mode, the indoor ambient temperature and target set temperature of the environment where the indoor unit of the air conditioner is located are obtained; When the temperature difference between the indoor ambient temperature and the target set temperature is greater than a preset threshold, and the outdoor ambient temperature is greater than or equal to a first temperature threshold, the shortest operating time of the air conditioner is determined to be a first duration; and When the outdoor ambient temperature is less than a first temperature threshold, the shortest operating time of the air conditioner is determined to be a second duration, which is greater than the first duration.

3. The control method for an air conditioner as described in claim 1, characterized in that, The control method for the air conditioner further includes: When the current operating mode is heating mode and the outdoor ambient temperature is less than the second temperature threshold, the shortest operating time of the air conditioner is determined to be the third duration. When the current operating mode is heating mode, and the outdoor ambient temperature is greater than or equal to a second temperature threshold and less than a third temperature threshold, the shortest operating time of the air conditioner is determined to be a fourth duration, wherein the third temperature threshold is greater than the second temperature threshold, and the fourth duration is less than the third duration; and When the current operating mode is heating mode and the outdoor ambient temperature is greater than or equal to the third temperature threshold, the shortest operating time of the air conditioner is determined to be the fifth duration, which is less than the fourth duration.

4. The control method for an air conditioner as described in any one of claims 1-3, characterized in that, The control of stopping the compressor includes: Obtain the operating frequency of the compressor; The set frequency is determined based on the outdoor ambient temperature; and When the operating frequency is less than or equal to the set frequency, the operating frequency of the compressor is reduced until the compressor stops.

5. The control method for an air conditioner as described in claim 4, characterized in that, The control method for the air conditioner further includes: When the operating frequency is greater than the set frequency, the operating frequency of the compressor is reduced to the set frequency; and After a six-hour interval, the operating frequency of the compressor is reduced until the compressor stops.

6. The control method for an air conditioner as described in claim 4, characterized in that, Determining the set frequency based on the outdoor ambient temperature includes: When the outdoor ambient temperature is lower than the second temperature threshold, the set frequency is determined to be the first frequency; and When the ambient temperature is greater than or equal to the second temperature threshold, the set frequency is determined to be the second frequency, which is greater than the first frequency.

7. The control method for an air conditioner as described in claim 1, characterized in that, The control method for the air conditioner further includes: When the continuous running time is less than the minimum running time, the current operating state of the air conditioner is maintained unchanged until the continuous running time is greater than or equal to the minimum running time.

8. A control device for an air conditioner, characterized in that, The control device for the air conditioner includes: The acquisition module is used to acquire the outdoor ambient temperature of the environment where the outdoor unit of the air conditioner is located, the current operating mode of the air conditioner, and the continuous operating time when the air conditioner receives a shutdown command during operation. The determination module is used to determine the shortest operating time of the air conditioner based on the current operating mode and the outdoor ambient temperature. The shortest operating time is the theoretical shortest operating time from the start-up of the air conditioner to the first shutdown. The control module is used to control the compressor to stop when the continuous running time is greater than or equal to the shortest running time.

9. 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 7.

10. 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 7.

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