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

Abstract

The application discloses a control method of an air conditioner, the air conditioner and a storage medium. The method comprises the following steps: controlling the air conditioner to run in a heating mode, and acquiring an operating state parameter of an outdoor unit of the air conditioner; determining a ventilation state parameter of an outdoor heat exchanger in the outdoor unit according to the operating state parameter; and when the ventilation state parameter meets a defrosting condition, controlling the air conditioner to run in a preset defrosting mode to defrost the outdoor heat exchanger. The application aims to improve the accuracy of defrosting mode starting control, so as to ensure the system operation stability and indoor comfort.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more particularly to a control method for an air conditioner, an air conditioner, and a storage medium. Background Technology

[0002] When an air conditioner is heating in low-temperature environments, the outdoor unit is prone to frost buildup. The air conditioner needs to defrost to maintain its heating performance. Some air conditioners will detect the frost thickness on the outdoor heat exchanger before initiating defrost mode; defrosting will only begin when the frost thickness reaches a certain threshold.

[0003] However, the current method of characterizing the frost thickness of outdoor heat exchangers is generally based on detecting ambient temperature and heating operation time. This method is limited by the detection accuracy of the sensors and the limitations of the installation location. It is also easily affected by environmental factors such as changes in ambient humidity, which can lead to a large deviation between the system's detected frost thickness and the actual frost thickness of the outdoor heat exchanger. This can cause false control of the defrosting mode, resulting in premature or excessive start-up of defrosting operation, which affects the stability of system operation and indoor comfort. Summary of the Invention

[0004] The main objective of this invention is to provide a control method for an air conditioner, an air conditioner, and a storage medium, which aims to improve the accuracy of defrost mode start-up control to ensure system operation stability and indoor comfort.

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

[0006] Control the air conditioner to operate in heating mode and obtain the operating status parameters of the outdoor unit of the air conditioner;

[0007] Determine the ventilation status parameters of the outdoor heat exchanger in the outdoor unit based on the operating status parameters;

[0008] When the ventilation status parameters meet the defrosting conditions, the air conditioner is controlled to run a preset defrosting mode to defrost the outdoor heat exchanger.

[0009] In one embodiment, the outdoor unit includes an outdoor heat exchanger and an outdoor fan, and the step of obtaining the operating status parameters of the outdoor unit of the air conditioner includes:

[0010] The temperature parameters of the outdoor heat exchanger and the operating parameters of the outdoor fan are obtained, and the operating status parameters include the temperature parameters and the operating parameters.

[0011] In one embodiment, the temperature parameters include the heat exchanger temperature and temperature drop value corresponding to the initial stage of the air conditioner starting heating and the current time, respectively; the operating parameters include the operating current corresponding to the initial stage of the air conditioner starting heating and the current time, respectively; and the step of determining the ventilation status parameters of the outdoor heat exchanger in the outdoor unit based on the operating status parameters includes:

[0012] The ventilation status parameters are determined based on the heat exchanger temperature, the temperature drop value, and the operating current corresponding to the initial stage of the air conditioner starting heating and the current time, respectively.

[0013] In one embodiment, the step of determining the ventilation status parameters based on the heat exchanger temperature, the temperature drop value, and the operating current corresponding to the initial stage of the air conditioner starting heating and the current time respectively includes:

[0014] The first ventilation volume of the outdoor heat exchanger is determined based on the heat exchanger temperature, temperature drop value and operating current at the initial stage, and the second ventilation volume of the outdoor heat exchanger is determined based on the heat exchanger temperature, temperature drop value and operating current at the current moment.

[0015] The attenuation value of the ventilation volume is determined based on the difference between the first ventilation volume and the second ventilation volume, and the ventilation status parameter includes the attenuation value.

[0016] In one embodiment, the step of determining the first ventilation volume of the outdoor heat exchanger based on the heat exchanger temperature, temperature drop value, and operating current corresponding to the initial stage includes:

[0017] The first ventilation volume is calculated by substituting the heat exchanger temperature, temperature drop value and operating current corresponding to the initial stage into the preset relationship;

[0018] The step of determining the second ventilation volume of the outdoor heat exchanger based on the current heat exchanger temperature, temperature drop value, and operating current includes:

[0019] The second ventilation volume is calculated by substituting the heat exchanger temperature, temperature drop value, and operating current at the current moment into the preset formula;

[0020] The preset relation is generated based on a neural network algorithm.

[0021] In one embodiment, the preset relation includes:

[0022] V = C0 + C1 * A + C2 * T3 2 +C3*T3*A+C4*(T30-T3)*A+C5*A 2 ;

[0023] Where V is the ventilation volume, C0, C1, C2, C3, C4, and C5 are constants, A is the operating current, (T30-T3) is the temperature drop value, and T3 is the heat exchanger temperature.

[0024] In one embodiment, the temperature drop value is the temperature difference between the initial heating temperature of the outdoor heat exchanger and the heat exchanger temperature at the corresponding moment.

[0025] In one embodiment, the ventilation status parameter includes a reduction value of ventilation volume in the heating mode, and the defrosting condition includes the reduction value being greater than a preset reduction amount and / or, after the step of determining the ventilation status parameter of the outdoor heat exchanger in the outdoor unit based on the operating status parameter, the method further includes:

[0026] When the ventilation status parameters do not meet the defrosting conditions, the air conditioner is controlled to maintain the heating mode.

[0027] In one embodiment, the step of controlling the air conditioner to operate in defrost mode includes:

[0028] The throttling device is increased to the defrosting opening, and the throttling device is located between the outdoor heat exchanger and the indoor heat exchanger of the air conditioner.

[0029] In addition, to achieve the above objectives, this application also proposes an air conditioner, the air conditioner comprising: a memory, a processor, and an air conditioner control program stored in the memory and executable on the processor, wherein when the air conditioner control program is executed by the processor, it implements the steps of the air conditioner control method as described in any of the preceding claims.

[0030] In addition, to achieve the above objectives, this application also proposes a storage medium storing a control program for an air conditioner, which, when executed by a processor, implements the steps of the control method for the air conditioner as described in any of the preceding claims.

[0031] This invention proposes a control method for an air conditioner. During the air conditioner's heating mode operation, this method no longer characterizes the frost thickness of the outdoor heat exchanger based on ambient temperature and heating duration. Instead, it characterizes the frost thickness of the outdoor heat exchanger using ventilation status parameters determined by the outdoor unit's operating status parameters. This process ensures that the frost thickness is not affected by environmental factors such as ambient temperature and humidity, guaranteeing that the frost thickness can be accurately determined using ventilation status parameters regardless of ambient temperature or humidity, and that the defrosting mode is activated accordingly. This prevents the defrosting mode from activating too early or too late during heating, thereby improving the accuracy of defrosting mode activation control and ensuring system stability and indoor comfort. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the system structure of an embodiment of the air conditioner of the present invention;

[0033] Figure 2 This is a schematic diagram of the hardware structure involved in the operation of an embodiment of the control method for the air conditioner of the present invention;

[0034] Figure 3 This is a flowchart illustrating an embodiment of the control method for an air conditioner according to the present invention;

[0035] Figure 4 This is a flowchart illustrating another embodiment of the control method for an air conditioner according to the present invention;

[0036] Figure 5 This is a schematic diagram illustrating the fit between the ventilation volume of the outdoor heat exchanger calculated based on a preset formula and the ventilation volume of the outdoor heat exchanger when it is frosted, obtained through actual measurement, in an embodiment of the present invention.

[0037] 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

[0038] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0039] The main solution of this application embodiment is: controlling the air conditioner to operate in heating mode, obtaining the operating status parameters of the outdoor unit of the air conditioner; determining the ventilation status parameters of the outdoor heat exchanger in the outdoor unit based on the operating status parameters; when the ventilation status parameters meet the defrosting conditions, controlling the air conditioner to operate in a preset defrosting mode to defrost the outdoor heat exchanger.

[0040] In this embodiment, for ease of description, the following description uses an air conditioner as the subject of execution.

[0041] In existing technologies, the frost thickness of outdoor heat exchangers is generally characterized by detecting ambient temperature and heating operation time. This method is limited by the detection accuracy of sensors and the limitations of installation location. It is also easily affected by environmental factors such as changes in ambient humidity. This leads to a large deviation between the system's detected frost thickness and the actual frost thickness of the outdoor heat exchanger, causing erroneous control of defrosting mode activation, premature or excessive activation of defrosting operation, which affects the system's operational stability and indoor comfort.

[0042] This application provides the above-mentioned solution, which, during the operation of the air conditioner in heating mode, no longer characterizes the frost thickness of the outdoor heat exchanger based on the ambient temperature and heating operation duration. Instead, it characterizes the frost thickness of the outdoor heat exchanger through the ventilation status parameters of the outdoor heat exchanger determined by the operating status parameters of the outdoor unit. In this process, the characterization of the frost thickness of the outdoor heat exchanger is not affected by environmental factors such as ambient temperature and humidity. This ensures that regardless of the ambient temperature and humidity, the frost thickness of the outdoor heat exchanger can be accurately determined through the ventilation status parameters, and the defrosting mode can be started based on this. This ensures that the defrosting mode is not started too early or too late during the heating process, thereby improving the accuracy of the defrosting mode start control and ensuring system operation stability and indoor comfort.

[0043] This application provides an air conditioner. The air conditioner may include any type of air conditioner such as a wall-mounted air conditioner, a cabinet air conditioner, a window air conditioner, or a ceiling-mounted air conditioner.

[0044] In this embodiment of the invention, reference is made to Figure 1 and Figure 2 The air conditioner includes a control device 100, a compressor 1, a reversing assembly 2, an indoor heat exchanger 7, a throttling device 4, and an outdoor heat exchanger 3. The indoor heat exchanger 7, the throttling device 4, and the outdoor heat exchanger 3 are connected sequentially. The exhaust port and return port of the indoor heat exchanger 7, the outdoor heat exchanger 3, and the compressor 1 are all connected to the reversing assembly 2. An indoor fan 8 is installed correspondingly to the indoor heat exchanger 7, and an outdoor fan 9 is installed correspondingly to the outdoor heat exchanger 3. The compressor 1, the reversing assembly 2, the throttling device 4, the outdoor fan 9, and the indoor fan 8 are all connected to the control device 100. The throttling device 4 can be an electronic expansion valve.

[0045] The reversing assembly 2 may include a four-way valve, etc. The reversing assembly 2 has a first state and a second state to switch between different refrigerant flow directions. When the reversing assembly 2 is running in the first state, the exhaust port of the compressor 1 is connected to the outdoor heat exchanger 3 and the return port of the compressor 1 is connected to the indoor heat exchanger 7. The refrigerant flowing out of the compressor 1 flows sequentially through the outdoor heat exchanger 3, the throttling device 4, and the indoor heat exchanger 7 before returning to the compressor 1. When the reversing assembly 2 is running in the second state, the exhaust port of the compressor 1 is connected to the indoor heat exchanger 7 and the return port of the compressor 1 is connected to the outdoor heat exchanger 3. The refrigerant flowing out of the compressor 1 flows sequentially through the indoor heat exchanger 7, the throttling device 4, and the outdoor heat exchanger 3 before returning to the compressor 1.

[0046] Based on the above settings, the operating modes of an air conditioner include at least the following:

[0047] In heating mode, the reversing component 2 operates in the second state, the throttling device 4 operates at the first opening degree, the compressor 1 operates at the heating frequency, the indoor heat exchanger 7 is in the condensing state, and the outdoor heat exchanger 3 is in the evaporating state.

[0048] In the first defrosting mode, the reversing component 2 operates in the second state, the throttling device 4 operates at the second opening degree, which is greater than the first opening degree, the compressor 1 operates at the first defrosting frequency, the indoor heat exchanger 7 is in the condensation state, and the outdoor heat exchanger 3 releases heat to melt the frost in its space.

[0049] In the second defrosting mode, the reversing assembly 2 operates in the second state, the throttling device 4 operates at the third opening degree, the second opening degree is greater than or equal to the third opening degree, the compressor 1 operates at the second defrosting frequency, the first defrosting frequency is greater than the second defrosting frequency, the indoor heat exchanger 7 is in the condensing state, and the outdoor heat exchanger 3 is in the heat release state, and the space in which it is located is frosted.

[0050] In cooling mode, the reversing assembly 2 operates in the first state, the throttling device 4 operates at the fourth opening degree, the compressor 1 operates at the cooling frequency, the indoor heat exchanger 7 is in the evaporation state, and the outdoor heat exchanger 3 is in the condensation state.

[0051] In the third defrosting mode, the reversing component 2 operates in the first state, the throttling device 4 operates at the fifth opening degree, the compressor 1 operates at the third defrosting frequency, the indoor heat exchanger 7 is in the evaporation state, and the outdoor heat exchanger 3 is in the condensation state, releasing heat to melt the frost in its space.

[0052] In the first defrost mode, the frost thickness is greater than that in the second defrost mode, and in the third defrost mode, the frost thickness is greater than that in the first defrost mode. When the air conditioner switches from heating mode to the first or second defrost mode, the commutator 2 does not need to reverse, and the indoor heat exchanger 7 remains in a heat-releasing state. The opening of the throttling device 4 is increased to raise the temperature of the refrigerant flowing into the outdoor heat exchanger 3, thereby melting the frost on the outdoor heat exchanger 3. This process effectively reduces the noise generated by the commutator 2 during switching and reduces temperature fluctuations in the indoor environment. When the air conditioner switches from heating mode to the third defrost mode, the commutator 2 needs to reverse, the indoor heat exchanger 7 is in an evaporating state, and the outdoor heat exchanger switches to a condensing state. The high-temperature refrigerant discharged from the compressor 1 flows into the outdoor heat exchanger 3 for defrosting.

[0053] In this embodiment, the second opening degree and the third opening degree are the maximum opening degree of the throttling device 4. In other embodiments, the second opening degree and the third opening degree may also be smaller than the maximum opening degree and larger than the first opening degree.

[0054] In this embodiment, refer to Figure 1The air conditioner also includes a refrigerant heat dissipation assembly 5 and a one-way throttling valve 6. The refrigerant heat dissipation assembly 5 is configured to dissipate heat from the heat-generating components in the air conditioner. The outdoor heat exchanger 3, the throttling device 4, the refrigerant heat dissipation assembly 5, the one-way throttling valve 6, and the indoor heat exchanger 7 are connected in sequence. The one-way throttling valve 6 is configured to throttle the refrigerant in one direction when it flows from the refrigerant heat dissipation assembly 5 to the indoor heat exchanger 7, and not throttle the refrigerant when it flows from the indoor heat exchanger 7 to the refrigerant heat dissipation assembly 5.

[0055] In one embodiment, reference is made to Figure 2 The air conditioner also includes a temperature sensor 01, which is connected to the control device 100. The temperature sensor 01 can be installed in the outdoor heat exchanger 3 to detect its temperature. Specifically, the temperature sensor 01 can be installed at at least one of the following temperatures: the inlet of the outdoor heat exchanger 3, the outlet of the outdoor heat exchanger 3, the middle of the outdoor heat exchanger 3, between different heat exchange sections of the outdoor heat exchanger 3, etc. In this embodiment, the temperature sensor 01 is installed at the inlet of the outdoor heat exchanger 3 to detect the refrigerant temperature at the inlet of the outdoor heat exchanger 3.

[0056] Among them, reference Figure 2 The control device 100 for the air conditioner includes: at least one processor 1001; and a memory 1002 communicatively connected to the at least one processor 1001, and a timer 1003, etc.; wherein the memory 1002 stores instructions that can be executed by the at least one processor 1001, and the instructions are executed by the at least one processor 1001 to enable the at least one processor 1001 to perform the control method of the air conditioner in the following embodiments.

[0057] The following is for reference. Figure 2 The diagram illustrates a structural schematic of a control device 100 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 radio 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 2 The control device 100 shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0058] like Figure 2As shown, the control device 100 may include a processor 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in memory 1002. The program in memory 1002 may be a program in read-only memory (ROM) or a program loaded from a storage device into random access memory (RAM). The RAM also stores various programs and data required for the operation of the control device 100. The processor 1001 and memory 1002 (ROM and RAM) are interconnected via a bus. Input / output (I / O) interfaces are also connected to the bus. Typically, the following systems can be connected to the I / O interface: input devices including, for example, touchscreens, touchpads, keyboards, mice, image sensors, microphones, accelerometers, gyroscopes, etc.; output devices including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; storage devices including, for example, magnetic tapes, hard disks, etc.; and communication devices. The communication device allows the control device 100 to communicate wirelessly or wiredly with other devices to exchange data. Although the control unit 100 with various systems is shown in the figure, 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 or have alternatively.

[0059] Specifically, according to the embodiments disclosed in this application, the method flows described in the following embodiments can be implemented as a computer software program. For example, the 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 flowchart. In such an embodiment, the computer program can be downloaded and installed from a network via a communication device, or installed from memory 1002. When the computer program is executed by processor 1001, it performs the functions defined in the control method for an air conditioner according to the embodiments disclosed in this application.

[0060] The air conditioner provided in this application, employing the control method described in the following embodiments, solves the problem of how to improve the accuracy of defrosting mode start-up control, thereby ensuring system operational stability and indoor comfort. Compared with the prior art, the beneficial effects of the air conditioner provided in this application are the same as those of the control method described in the following embodiments, and other technical features of this air conditioner are the same as those disclosed in the method of the following embodiments, and will not be repeated here.

[0061] 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 or air conditioner capable of performing the above functions. The following description uses an air conditioner as an example to illustrate this embodiment and the subsequent embodiments.

[0062] This invention also provides a control method for an air conditioner, applied to the aforementioned air conditioner.

[0063] Reference Figure 3 This application proposes an embodiment of a control method for an air conditioner. In this embodiment, the control method for the air conditioner includes steps S10 to S30:

[0064] Step S10: Control the air conditioner to operate in heating mode and obtain the operating status parameters of the outdoor unit of the air conditioner;

[0065] During the operation of the air conditioner in heating mode, the reversing component operates in the second state, the throttling device operates at the throttling opening, the compressor operates at the heating frequency, and the refrigerant discharged by the compressor flows sequentially through the indoor heat exchanger, the throttling device, and the outdoor heat exchanger before returning to the compressor. The indoor heat exchanger is in the condensing state, and the outdoor heat exchanger is in the evaporating state.

[0066] The operating status parameters here refer to the outdoor unit's own status parameters, which may include the status parameters at the current moment, the status parameters corresponding to different moments, or the status parameters within a preset time period. Operating status parameters may include at least one of the following: outdoor heat exchanger temperature, outdoor heat exchanger temperature change parameters, outdoor heat exchanger pressure, outdoor heat exchanger pressure change parameters, outdoor fan speed, outdoor fan speed change parameters, outdoor fan operating current, outdoor fan current change parameters, outdoor fan power, etc.

[0067] Operating status parameters can be obtained by sensors installed in the outdoor unit and / or by monitoring modules built into the control device (such as current monitoring modules).

[0068] During the heating mode of the air conditioner, the outdoor fan is on. The outdoor fan speed can be maintained at the target speed or adjusted according to the actual operating parameters.

[0069] Step S20: Determine the ventilation status parameters of the outdoor heat exchanger in the outdoor unit based on the operating status parameters;

[0070] Ventilation status parameters indicate the frost thickness on the outdoor heat exchanger. These parameters may include the current ventilation volume and / or the attenuation value of the ventilation volume, etc.

[0071] The correspondence between operating status parameters and ventilation status parameters can be preset. This correspondence can include formulas or mappings, and the ventilation status parameters corresponding to the current operating status parameters can be determined based on this correspondence. In this embodiment, the correspondence is obtained through fitting using a neural network algorithm.

[0072] In one implementation, the parameter range in which the operating status parameters are located can be determined, and the ventilation status parameters here can be determined based on the parameter range.

[0073] In another implementation, the ventilation status parameters can be calculated by substituting the operating status parameters into a preset formula.

[0074] In another implementation, the operating status parameters may include sub-operating status parameters of the outdoor heat exchanger at different times during the heating mode of the air conditioner. Sub-ventilation status parameters of the outdoor heat exchanger at the corresponding time can be determined based on each sub-operating status parameter. The change parameters of the ventilation status of the outdoor heat exchanger during the heating process of the air conditioner can be determined based on at least two sub-ventilation status parameters.

[0075] Step S30: When the ventilation status parameters meet the defrosting conditions, control the air conditioner to run a preset defrosting mode to defrost the outdoor heat exchanger.

[0076] The defrosting conditions are the conditions that the ventilation parameters must meet when the outdoor heat exchanger is frosted and affects the heating capacity, requiring defrosting.

[0077] Defrosting conditions may include the target range that the ventilation status parameters need to reach, or the target relationship between the ventilation status parameters and preset parameters, etc.

[0078] In this embodiment, the indoor heat exchanger is in heating mode during the preset defrost mode. The preset defrost mode includes either the first defrost mode or the second defrost mode described above. When the air conditioner is operating in defrost mode, the reversing assembly can be controlled to maintain its current state, and the throttling device can be controlled to increase to the defrost opening. The throttling device is located between the outdoor heat exchanger and the indoor heat exchanger of the air conditioner. Here, the throttling device can increase its opening at a preset rate continuously to the defrost opening, or it can increase it in a stepwise manner. When the defrost mode includes the first defrost mode, the throttling device increases from the first opening to the second opening; when the defrost mode includes the second defrost mode, the throttling device increases from the first opening to the third opening. By increasing the opening of the throttling device, the throttling and pressure reduction effect of the throttling device can be effectively reduced, increasing the temperature of the refrigerant flowing out of the throttling device. The indoor heat exchanger can maintain its heating state to reduce indoor temperature fluctuations during defrosting. Furthermore, more refrigerant can absorb heat from the heat-generating components at the refrigerant heat dissipation components, allowing the refrigerant carrying more heat to flow into the outdoor heat exchanger for defrosting, achieving a rapid melting of thin frost. In this embodiment of the invention, when the air conditioner is operating in defrost mode, the compressor's operating frequency is reduced to the defrost frequency; and / or, the indoor fan speed is reduced to the defrost speed. In this embodiment of the invention, the throttling device can be increased to the defrost opening in stages; the compressor's operating frequency can be reduced to the defrost frequency in stages; and the indoor fan speed can be reduced to the defrost speed in stages.

[0079] This invention proposes a control method for an air conditioner. During the air conditioner's heating mode operation, this method no longer characterizes the frost thickness of the outdoor heat exchanger based on ambient temperature and heating duration. Instead, it characterizes the frost thickness of the outdoor heat exchanger using ventilation status parameters determined by the outdoor unit's operating status parameters. This ensures that the frost thickness is not affected by environmental factors such as ambient temperature and humidity, guaranteeing accurate determination of the frost thickness regardless of ambient temperature or humidity. Based on this, the defrosting mode is activated, preventing premature or delayed activation during heating and improving the accuracy of defrosting mode activation control. This ensures system stability and indoor comfort.

[0080] In other embodiments, the preset defrost mode may also be the third defrost mode described above.

[0081] In this embodiment, after step S20, when the ventilation status parameters do not meet the defrosting conditions, the air conditioner is controlled to maintain the heating mode, thereby effectively ensuring the heating stability of the air conditioner.

[0082] In other embodiments, after step S20, it may also be determined whether to maintain the heating mode based on other operating parameters, such as the indoor temperature reached by the air conditioner.

[0083] In one feasible implementation of this embodiment, the ventilation status parameter includes the attenuation value of the ventilation volume in the heating mode, and the defrosting condition includes the attenuation value being greater than a preset attenuation amount.

[0084] Based on this, when the attenuation value is greater than the preset attenuation amount, the air conditioner is controlled to run a preset defrosting mode to defrost the outdoor heat exchanger; when the attenuation value is less than or equal to the preset attenuation amount, the air conditioner is controlled to maintain the heating mode.

[0085] In this embodiment, since the degree of frost on the outdoor heat exchanger varies, it has different effects on the attenuation of ventilation of the outdoor heat exchanger during the heating process of the air conditioner. Therefore, setting the defrosting conditions in the above manner is beneficial to further improve the accuracy of defrosting control.

[0086] In other embodiments, ventilation status parameters may also include the current ventilation volume of the outdoor heat exchanger, and defrosting conditions include ventilation volume being less than a preset air volume.

[0087] Furthermore, based on the above embodiments, another embodiment of the control method for the air conditioner of this application is proposed. In this embodiment, the outdoor unit includes an outdoor heat exchanger and an outdoor fan, referring to... Figure 4 The step of obtaining the operating status parameters of the outdoor unit of the air conditioner includes:

[0088] Step S11: Obtain the temperature parameters of the outdoor heat exchanger and the operating parameters of the outdoor fan. The operating status parameters include the temperature parameters and the operating parameters.

[0089] The temperature parameters include at least one of the following: the temperature at the current moment, the temperatures corresponding to the current moment and the initial stage of the heating mode, respectively, and the temperature change parameters from the initial stage of the heating mode to the current moment. In this embodiment, the temperature parameters can be determined based on data detected by a temperature sensor installed at the refrigerant inlet of the outdoor heat exchanger.

[0090] Operating parameters include at least one of the following: operating current, operating power, operating voltage, operating speed, wind speed, etc.

[0091] Based on step S11, step S20 may include:

[0092] Step S21: Determine the ventilation status parameters based on the temperature parameters and the operating parameters.

[0093] In one implementation, ventilation status parameters can be calculated from temperature parameters, operating parameters, and preset formulas. In another implementation, a first interval containing the temperature parameters can be determined, a second interval containing the operating parameters can be determined, and the ventilation status parameters can be determined based on the first and second intervals.

[0094] In this embodiment, the temperature parameters include the heat exchanger temperature and temperature drop value corresponding to the initial stage of the air conditioner starting heating and the current time, respectively. The operating parameters include the operating current corresponding to the initial stage of the air conditioner starting heating and the current time, respectively. The step of determining the ventilation status parameters of the outdoor heat exchanger in the outdoor unit based on the operating status parameters includes: determining the ventilation status parameters based on the heat exchanger temperature, the temperature drop value, and the operating current corresponding to the initial stage of the air conditioner starting heating and the current time, respectively.

[0095] The initial stage of the air conditioner starting heating refers to a preset time period during which the air conditioner continues to heat for a duration less than or equal to the preset duration after starting the heating mode (which may include the first start of the heating mode or the restart of the heating mode after switching to defrost mode during the heating mode).

[0096] In this embodiment, the temperature drop value is the temperature difference between the initial heating temperature of the outdoor heat exchanger and the corresponding temperature of the heat exchanger at that moment. Here, the initial heating temperature is the initial temperature of the outdoor heat exchanger when the air conditioner is first powered on and operates in heating mode. In this embodiment, the initial heating temperature is detected during a period of continuous operation (e.g., 7 minutes to 12 minutes) after the air conditioner is first powered on and operates in heating mode, with the minimum temperature among the temperature data detected by the temperature sensor on the outdoor heat exchanger during this period being used as the initial heating temperature.

[0097] The operating current is the measured current value at the corresponding time.

[0098] In this embodiment, the control parameters of the outdoor fan are the same for the initial stage and the current time. That is to say, the temperature parameters and operating parameters at different times are detected under the condition that the output capacity of the outdoor fan is the same.

[0099] In one feasible implementation, a first ventilation volume of the outdoor heat exchanger is determined based on the heat exchanger temperature, temperature drop value, and operating current at the initial stage; a second ventilation volume of the outdoor heat exchanger is determined based on the heat exchanger temperature, temperature drop value, and operating current at the current moment; and an attenuation value of the ventilation volume is determined based on the difference between the first and second ventilation volumes, where the ventilation status parameter includes the attenuation value. Here, the difference can be used as the attenuation value, or the attenuation value can be obtained by correcting the difference based on the actual operating conditions of the air conditioner.

[0100] In another feasible implementation, a first change value of the heat exchanger temperature and a second change value of the temperature drop can be determined based on the heat exchanger temperature and temperature drop value corresponding to the initial stage of the air conditioner starting heating and the current time, respectively. A third change value of the outdoor fan operating current can be determined based on the operating current corresponding to the initial stage of the air conditioner starting heating and the current time, respectively. The attenuation value of the outdoor heat exchanger ventilation volume can be determined based on the first change value, the second change value, and the third change value.

[0101] In this embodiment, by combining the temperature parameters of the outdoor heat exchanger and the operating parameters of the outdoor fan, the ventilation status of the outdoor heat exchanger can be accurately characterized, thereby ensuring that the obtained ventilation status parameters can accurately represent the frost thickness of the outdoor heat exchanger and effectively improve the precision of defrosting control. Specifically, by combining the heat exchanger temperature, temperature drop value, and operating current at the initial heating stage and the current moment, the attenuation value of the outdoor heat exchanger's ventilation volume is determined. This ensures that the attenuation value accurately reflects the airflow reduction caused by changes in frost thickness during the air conditioner's heating process. Therefore, defrosting start control based on this attenuation value further improves the precision of the air conditioner's defrosting start control, thereby further enhancing system operational stability and indoor heating comfort.

[0102] In other embodiments, the temperature parameters may also include the heat exchanger temperature and / or temperature drop at the current moment, and the operating parameters include the operating current at the current moment. The ventilation volume of the outdoor heat exchanger at the current moment is determined as the ventilation status parameter based on the heat exchanger temperature and / or temperature drop and the operating current at the current moment.

[0103] In other embodiments, the temperature drop value may also be the temperature difference between the initial temperature of the outdoor heat exchanger and the current temperature of the heat exchanger during the current continuous heating process of the air conditioner.

[0104] In one feasible implementation of this embodiment, the step of determining the first ventilation volume of the outdoor heat exchanger based on the heat exchanger temperature, temperature drop value, and operating current corresponding to the initial stage includes: substituting the heat exchanger temperature, temperature drop value, and operating current corresponding to the initial stage into a preset formula to calculate the first ventilation volume; the step of determining the second ventilation volume of the outdoor heat exchanger based on the heat exchanger temperature, temperature drop value, and operating current corresponding to the current moment includes: substituting the heat exchanger temperature, temperature drop value, and operating current corresponding to the current moment into a preset formula to calculate the second ventilation volume; wherein, the preset formula is generated based on a neural network algorithm.

[0105] Neural network algorithms may include at least one of the following: convolutional neural network algorithms, recurrent neural network algorithms, generative adversarial network algorithms, etc.

[0106] The preset formula can be a fixed one, or it can be obtained based on the actual operating conditions of the air conditioner. For example, the preset formula can be obtained based on the current compressor operating frequency and / or the temperature difference between the indoor heat exchanger temperature and the set temperature.

[0107] In this embodiment, the preset relation includes:

[0108] V = C0 + C1 * A + C2 * T3 2 +C3*T3*A+C4*(T30-T3)*A+C5*A 2 ;

[0109] Where V is the ventilation volume, C0, C1, C2, C3, C4, and C5 are constants, A is the operating current, (T30-T3) is the temperature drop value, and T3 is the heat exchanger temperature.

[0110] To better illustrate the alignment between the ventilation volume calculated using the neural network algorithm and the actual ventilation volume of the outdoor heat exchanger in this embodiment, combined with... Figure 5 A is the airflow curve generated based on a neural network algorithm, and B is the airflow curve obtained from actual detection.

[0111] In this embodiment, the relationship between the outdoor heat exchanger temperature parameters, the outdoor fan operating current, and the ventilation volume is generated based on the neural network algorithm. The ventilation volume determined by this relationship is used to calculate the ventilation attenuation of the outdoor heat exchanger, thereby ensuring that the obtained result can closely match the attenuation of the outdoor heat exchanger under the influence of frost. This is beneficial to further improve the accuracy of defrosting start-up control and effectively improve the system's operational stability and indoor comfort.

[0112] 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.

[0113] 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.

[0114] 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.

[0115] The aforementioned computer-readable storage medium carries one or more programs that, when executed by the air conditioner, cause the air conditioner to perform the following process: controlling the air conditioner to operate in heating mode; acquiring the operating status parameters of the outdoor unit of the air conditioner; determining the ventilation status parameters of the outdoor heat exchanger in the outdoor unit based on the operating status parameters; and controlling the air conditioner to operate in a preset defrosting mode to defrost the outdoor heat exchanger when the ventilation status parameters meet the defrosting conditions.

[0116] 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).

[0117] 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. This solves the technical problem of how to improve the accuracy of defrost mode start-up control to ensure system operational stability and indoor comfort. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the air conditioner control method provided in the above embodiments, and will not be repeated here.

[0118] 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.

[0119] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. Modules described in the embodiments of this application can be implemented in software or hardware. The names of modules do not necessarily limit the specific unit itself. 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.

[0120] The above descriptions are merely some embodiments of this application and do not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the content of this specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application. Therefore, the protection scope of this application should be determined by the scope of the claims.

Claims

1. A control method for an air conditioner, characterized in that, The control method for the air conditioner includes the following steps: Control the air conditioner to operate in heating mode and obtain the operating status parameters of the outdoor unit of the air conditioner; Determine the ventilation status parameters of the outdoor heat exchanger in the outdoor unit based on the operating status parameters; When the ventilation status parameters meet the defrosting conditions, the air conditioner is controlled to run a preset defrosting mode to defrost the outdoor heat exchanger. The outdoor unit includes an outdoor heat exchanger and an outdoor fan. The step of obtaining the operating status parameters of the outdoor unit of the air conditioner includes: The temperature parameters of the outdoor heat exchanger and the operating parameters of the outdoor fan are obtained. The operating parameters include the temperature parameters and the operating parameters. The temperature parameters include the heat exchanger temperature and temperature drop value corresponding to the initial stage of the air conditioner starting heating and the current time, respectively. The operating parameters include the operating current of the outdoor fan corresponding to the initial stage of the air conditioner starting heating and the current time, respectively. The step of determining the ventilation status parameters of the outdoor heat exchanger in the outdoor unit based on the operating status parameters includes: The first ventilation volume of the outdoor heat exchanger is determined based on the heat exchanger temperature, temperature drop value, and operating current corresponding to the initial stage of the air conditioner starting heating, and the second ventilation volume of the outdoor heat exchanger is determined based on the heat exchanger temperature, temperature drop value, and operating current corresponding to the current moment. The attenuation value of the ventilation volume is determined based on the difference between the first ventilation volume and the second ventilation volume, and the ventilation status parameter includes the attenuation value.

2. The method as described in claim 1, characterized in that, The step of determining the first ventilation volume of the outdoor heat exchanger based on the heat exchanger temperature, temperature drop value, and operating current at the initial stage includes: The first ventilation volume is calculated by substituting the heat exchanger temperature, temperature drop value and operating current corresponding to the initial stage into the preset relationship; The step of determining the second ventilation volume of the outdoor heat exchanger based on the current heat exchanger temperature, temperature drop value, and operating current includes: The second ventilation volume is calculated by substituting the heat exchanger temperature, temperature drop value, and operating current at the current moment into the preset formula; The preset relation is generated based on a neural network algorithm.

3. The method as described in claim 2, characterized in that, The preset relational expressions include: V=C0+C1*A+C2*T3 2 +C3*T3*A+C4*(T30-T3)*A+C5*A 2 ; Where V is the ventilation volume, C0, C1, C2, C3, C4, and C5 are all constants, A is the operating current, (T30-T3) is the temperature drop value, T30 is the initial heating temperature of the outdoor heat exchanger, and T3 is the heat exchanger temperature.

4. The method as described in claim 1 or 2, characterized in that, The temperature drop value is the temperature difference between the initial heating temperature of the outdoor heat exchanger and the corresponding temperature of the heat exchanger at that moment.

5. The method according to any one of claims 1 to 3, characterized in that, The ventilation status parameters include the attenuation value of the ventilation volume in the heating mode, and the defrosting conditions include the attenuation value being greater than a preset attenuation amount and / or, after the step of determining the ventilation status parameters of the outdoor heat exchanger in the outdoor unit based on the operating status parameters, the method further includes: When the ventilation status parameters do not meet the defrosting conditions, the air conditioner is controlled to maintain the heating mode.

6. The method according to any one of claims 1 to 3, characterized in that, The steps for controlling the air conditioner to operate in defrost mode include: The throttling device is increased to the defrosting opening, and the throttling device is located between the outdoor heat exchanger and the indoor heat exchanger of the air conditioner.

7. 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. When the control program for the air conditioner is executed by the processor, it implements the steps of the control method for the air conditioner as described in any one of claims 1 to 6.

8. 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 steps of the control method for an air conditioner as described in any one of claims 1 to 6.

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