A defrosting control method and device, computer equipment and air conditioner

Abstract

The application provides a defrosting control method and device, computer equipment and an air conditioner. The method comprises monitoring a current change rate of a fan when the air conditioner is in a stable running state; the stable running state is a running state of the air conditioner after a preset initial time after starting; when the current change rate is greater than a preset change rate threshold, it is determined that the evaporator of the air conditioner is frosted; and the evaporator defrosting operation is performed based on the evaporator tube temperature. The method provided by the application can perform the evaporator defrosting operation based on the running state of the air conditioner, thereby ensuring the efficient running of the air conditioner.

Description

Technical Field

[0001] This application relates to the field of air conditioner technology, and in particular to a defrosting control method, device, computer equipment, and air conditioner. Background Technology

[0002] For air conditioners, humid, hot air passing over the low-temperature evaporator surface will cause condensation or frost. If the evaporator temperature is below the air dew point, condensation will occur; if the evaporator temperature is below the freezing point of water, frost will form. Because water vapor in the air continuously moves towards the cold surface and condenses under pressure, the density and thickness of the frost layer will continuously increase, leading to persistent frost or ice buildup on the evaporator. This reduces the airflow area of ​​the evaporator, causing a rapid decrease in the overall cooling efficiency of the air conditioner. Frost can clog the drain, causing leaks, and the compressor may experience wear and tear due to liquid returning from the compressor, potentially even causing the air conditioning system to malfunction. Therefore, timely and effective defrosting is essential for the normal operation of the air conditioner.

[0003] Existing evaporator defrosting technologies primarily involve installing temperature sensors on the copper tubes in the middle of the evaporator. When the detected temperature falls below a set value, the evaporator is de-frozen or defrosted. However, defrosting is ineffective when the refrigerant circulation is insufficient or the pipes are clogged. For example, if the inlet temperature of the evaporator is below the freezing point, frost begins to form at the inlet. Due to insufficient refrigerant circulation, after heat exchange with the air, the temperature in the middle of the evaporator is higher than or far above the freezing point of water. At this point, the sensor in the middle of the evaporator does not detect a temperature that meets the conditions for de-frozen or defrosting. As the unit operates, the frost at the evaporator inlet gradually thickens and spreads towards the outlet. The temperature in the middle of the evaporator gradually decreases, and when it reaches the de-frozen or defrosting condition, the de-frozen or defrosting action is initiated. However, because a large amount of frost accumulates at the evaporator inlet, even after de-frozen and defrosting actions are performed, the frost on the evaporator is difficult to completely melt. This frost continues to accumulate during air conditioner operation, leading to a rapid decline in the overall cooling performance. Summary of the Invention

[0004] To address the problem of poor defrosting performance of existing air conditioner indoor units, this application provides a defrosting control method, device, computer equipment, and air conditioner, which can perform targeted evaporator defrosting operations based on the air conditioner's operating status, ensuring efficient operation of the air conditioner.

[0005] On the one hand, a defrosting control method is provided, the method comprising:

[0006] When the air conditioner is in a stable operating state, the rate of change of the fan current is monitored; the stable operating state is the operating state of the air conditioner after a preset initial time has elapsed since it was turned on.

[0007] When the rate of change of the current is greater than a pre-stored rate of change threshold, it is determined that the evaporator of the air conditioner is frosted.

[0008] The evaporator tube temperature is detected, and the evaporator defrosting operation is performed based on the evaporator tube temperature.

[0009] In some embodiments, prior to monitoring the rate of change of the wind turbine's current, the method further includes:

[0010] In response to the power-on command, determine whether the air conditioner is in cooling mode;

[0011] When the operating mode is cooling mode, the current ambient temperature is detected;

[0012] The duration of the initial time is determined based on the pre-stored correspondence between ambient temperature and initial duration.

[0013] The rate of change of the wind turbine current within the initial time period is used as the rate of change threshold.

[0014] In some embodiments, the evaporator defrosting operation based on the evaporator tube temperature includes:

[0015] The location of frost formation on the evaporator is determined based on the evaporator tube temperature.

[0016] Perform evaporator defrosting operation based on the frosted location.

[0017] In some embodiments, determining the location of frost on the evaporator based on the evaporator tube temperature includes:

[0018] If the evaporator coil temperature is less than or equal to a pre-stored temperature threshold, then the evaporator coil is determined to be frosted.

[0019] If the evaporator tube temperature is greater than the pre-stored temperature judgment threshold, then it is determined that the evaporator inlet is frosted.

[0020] In some embodiments, the evaporator defrosting operation based on the frosting location includes:

[0021] When the coils of the evaporator are frosted, a defrosting operation is performed based on the temperature of the evaporator coils.

[0022] If the evaporator tube temperature is less than or equal to a first temperature threshold and greater than a second temperature threshold, then the compressor of the air conditioner is controlled to reduce its frequency at a first speed.

[0023] If the evaporator tube temperature is less than or equal to the second temperature threshold and greater than the third temperature threshold, then the compressor is controlled to reduce its frequency at a second speed, which is greater than the first speed.

[0024] If the evaporator tube temperature is lower than the third temperature threshold, the compressor is controlled to stop.

[0025] In some embodiments, the evaporator defrosting operation based on the frosting location includes:

[0026] When the inlet of the evaporator is frosted, a defrosting operation is performed based on the rate of change of the current.

[0027] If the rate of change of the current increases, the compressor of the air conditioner is controlled to reduce its frequency.

[0028] If the rate of change of the current continues to increase within a preset time period, the compressor is controlled to stop.

[0029] On the other hand, a defrosting control device is provided, the device comprising:

[0030] The current change rate acquisition module is used to monitor the current change rate of the fan when the air conditioner is in a stable operating state; the stable operating state is the operating state of the air conditioner after a preset initial time has elapsed since it was turned on.

[0031] The frosting detection module is used to determine that the evaporator of the air conditioner is frosted when the rate of change of the current is greater than a pre-stored rate of change threshold.

[0032] The defrosting control module is used to detect the evaporator tube temperature and perform evaporator defrosting operation based on the evaporator tube temperature.

[0033] In some embodiments, the apparatus further includes a rate of change threshold acquisition module, configured to:

[0034] In response to the power-on command, determine whether the air conditioner is in cooling mode;

[0035] When the operating mode is cooling mode, the current ambient temperature is detected;

[0036] The duration of the initial time is determined based on the pre-stored correspondence between ambient temperature and initial duration.

[0037] The rate of change of the wind turbine current within the initial time period is used as the rate of change threshold.

[0038] In some embodiments, the frosting control module includes:

[0039] The frost location determination unit is used to determine the frost location of the evaporator based on the evaporator tube temperature.

[0040] A defrosting operation control unit is used to perform evaporator defrosting operation based on the frosting location.

[0041] In some embodiments, the frosting location determination unit is specifically used for:

[0042] If the evaporator coil temperature is less than or equal to a pre-stored temperature threshold, then the evaporator coil is determined to be frosted.

[0043] If the evaporator tube temperature is greater than the pre-stored temperature judgment threshold, then it is determined that the evaporator inlet is frosted.

[0044] In some embodiments, the defrosting operation control unit is specifically used for:

[0045] When the coils of the evaporator are frosted, a defrosting operation is performed based on the temperature of the evaporator coils.

[0046] If the evaporator tube temperature is less than or equal to a first temperature threshold and greater than a second temperature threshold, then the compressor of the air conditioner is controlled to reduce its frequency at a first speed.

[0047] If the evaporator tube temperature is less than or equal to the second temperature threshold and greater than the third temperature threshold, then the compressor is controlled to reduce its frequency at a second speed, which is greater than the first speed.

[0048] If the evaporator tube temperature is lower than the third temperature threshold, the compressor is controlled to stop.

[0049] In some embodiments, the defrosting operation control unit is further configured to:

[0050] When the inlet of the evaporator is frosted, a defrosting operation is performed based on the rate of change of the current.

[0051] If the rate of change of the current increases, the compressor of the air conditioner is controlled to reduce its frequency.

[0052] If the rate of change of the current continues to increase within a preset time period, the compressor is controlled to stop.

[0053] On the other hand, a computer device is provided, which includes a processor and a memory. The memory stores at least one instruction, at least one program, code set, or instruction set. The processor can load and execute at least one instruction, at least one program, code set, or instruction set to implement the method provided in the above-mentioned embodiments.

[0054] On the other hand, an air conditioner is provided, which includes the computer equipment described above.

[0055] On the other hand, a computer-readable storage medium is provided, which stores at least one instruction, at least one program, code set, or instruction set. A processor can load and execute at least one instruction, at least one program, code set, or instruction set to implement the defrosting control method provided in the embodiments of this application.

[0056] On the other hand, a computer program product or computer program is provided, the computer program product or computer program including computer program instructions stored in a computer-readable storage medium. A processor reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform any of the defrosting control methods described in the above embodiments.

[0057] The beneficial effects of the technical solution provided in this application include at least the following: Embodiments of the present invention provide a defrosting control method, apparatus, computer equipment, and air conditioner. The method includes monitoring the rate of change of fan current when the air conditioner is in a stable operating state; the stable operating state is the operating state after the air conditioner has been turned on for a preset initial time; when the rate of change of current exceeds a pre-stored rate of change threshold, it is determined that the evaporator of the air conditioner is frosted; the evaporator pipe temperature is detected, and evaporator defrosting operation is performed based on the evaporator pipe temperature. The method provided by embodiments of the present invention can perform targeted evaporator defrosting operation based on the air conditioner's operating state, ensuring efficient operation of the air conditioner. Attached Figure Description

[0058] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0059] Figure 1 A schematic diagram illustrating the implementation flow of a defrosting control method provided in an exemplary embodiment of this application is shown.

[0060] Figure 2 This illustration shows a schematic diagram of the fan current value in a defrosting control method provided by an exemplary embodiment of this application;

[0061] Figure 3 This illustration shows another implementation flow diagram of a defrosting control method provided in an exemplary embodiment of this application;

[0062] Figure 4 This invention provides a structural diagram of a defrosting control device according to an exemplary embodiment of the present application.

[0063] Figure 5 A schematic diagram of the structure of a computer device corresponding to a defrosting control method provided in an exemplary embodiment of this application is shown. Detailed Implementation

[0064] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0065] The defrosting control method provided in this application can perform targeted evaporator defrosting based on the air conditioner's operating status, ensuring the efficient operation of the air conditioner.

[0066] Example 1

[0067] Figure 1 The diagram illustrates the implementation flow of a defrosting control method provided in an embodiment of the present invention.

[0068] See Figure 1 The defrosting control method provided in this embodiment of the invention may include steps 101 to 103.

[0069] Step 101: When the air conditioner is in a stable operating state, monitor the rate of change of the fan current; the stable operating state is the operating state of the air conditioner after a preset initial time has elapsed since it was turned on.

[0070] The method provided by this invention needs to detect or acquire the air conditioner's operating mode, ambient temperature, fan speed, running time, indoor fan current, and evaporator tube temperature in order to determine the frost condition of the evaporator and thus perform corresponding antifreeze or defrosting actions on the entire air conditioner.

[0071] In some embodiments, the method prior to step 101 further includes:

[0072] In response to the power-on command, determine whether the air conditioner is in cooling mode;

[0073] When the operating mode is cooling mode, the current ambient temperature is detected;

[0074] The duration of the initial time is determined based on the pre-stored correspondence between ambient temperature and initial duration.

[0075] The rate of change of the wind turbine current within the initial time period is used as the rate of change threshold.

[0076] Specifically, each time the machine is turned on, the current operating mode is detected. When the operating mode is cooling and the fan speed remains unchanged, the ambient temperature is detected, and the initial operating time corresponding to the current ambient temperature is determined according to the pre-stored temperature-operating time correspondence.

[0077] Table 1

[0078] t initial 0 t initial 1 t initial 2 t initial 3

[0079] Table 1 shows the correspondence between ambient temperature and initial running time in the method provided in the embodiments of the present invention.

[0080] The current value is continuously monitored during the initial operating time, and the initial rate of change ΔI of the air conditioner fan current during the initial operating time is calculated. 初始 The initial rate of change value is written into memory.

[0081] Step 102: When the rate of change of the current is greater than the pre-stored rate of change threshold, it is determined that the evaporator of the air conditioner is frosted.

[0082] Specifically, after the initial running time, the air conditioner enters a stable operating state. During this stable operating state, the rate of change of the fan current ΔI is monitored. When ΔI > ΔI 初始 This determines whether the evaporator is frosted.

[0083] In a specific example, the change in current over a time period t' is obtained in a loop to calculate the rate of change of current ΔI.

[0084] Figure 2 A schematic diagram of the indoor fan current variation of the method provided in an embodiment of the present invention is shown.

[0085] See Figure 2 In a specific example, the current rises rapidly during the air conditioner's startup phase, remains constant briefly, then decreases at a first rate for a short period. During the initial operation phase, it decreases slowly at a second rate. During stable operation, the current remains constant, and during the evaporator frosting phase, the current decreases at a third rate. In this example's operating state, the first rate is greater than the third rate, which is greater than the second rate.

[0086] Furthermore, the rate of decrease in current during the initial operating phase is ΔI. 初始 The rate of change of current during the evaporator frosting stage can be expressed as ΔI.

[0087] Step 103: Detect the evaporator tube temperature and perform evaporator defrosting operation based on the evaporator tube temperature.

[0088] In some embodiments, step 103 includes:

[0089] The location of frost formation on the evaporator is determined based on the evaporator tube temperature.

[0090] Perform evaporator defrosting operation based on the frosted location.

[0091] The method of determining the location of frost on the evaporator based on the evaporator tube temperature includes:

[0092] If the evaporator coil temperature is less than or equal to a pre-stored temperature threshold, then the evaporator coil is determined to be frosted.

[0093] If the evaporator tube temperature is greater than the pre-stored temperature judgment threshold, then it is determined that the evaporator inlet is frosted.

[0094] In some embodiments, after determining that the evaporator is frosted, the location of the frosting is further determined. If the evaporator tube temperature is greater than a preset temperature threshold, the location of the evaporator frosting is determined to be inlet frosting; if the evaporator tube temperature is less than or equal to the preset temperature threshold, the location of the evaporator frosting is determined to be coil frosting.

[0095] Different defrosting and antifreeze procedures are performed depending on the location of the frost.

[0096] In some embodiments, the evaporator defrosting operation based on the frosting location includes:

[0097] When the coils of the evaporator are frosted, a defrosting operation is performed based on the temperature of the evaporator coils.

[0098] If the evaporator tube temperature is less than or equal to a first temperature threshold and greater than a second temperature threshold, then the compressor of the air conditioner is controlled to reduce its frequency at a first speed.

[0099] If the evaporator tube temperature is less than or equal to the second temperature threshold and greater than the third temperature threshold, then the compressor is controlled to reduce its frequency at a second speed, which is greater than the first speed.

[0100] If the evaporator tube temperature is lower than the third temperature threshold, the compressor is controlled to stop.

[0101] When it is determined that the evaporator coil is frosted, the evaporator coil temperature is continuously monitored. When the evaporator coil temperature is less than or equal to the first temperature threshold and greater than the second temperature threshold, the operating frequency of the air conditioner compressor is controlled to be reduced from normal speed. When the evaporator coil temperature is less than or equal to the second temperature threshold and greater than the third temperature threshold, the operating frequency of the air conditioner compressor is controlled to be reduced rapidly. If the evaporator coil temperature is less than the third temperature threshold, the compressor is controlled to stop for defrosting.

[0102] In some embodiments, the evaporator defrosting operation based on the frosting location includes:

[0103] When the inlet of the evaporator is frosted, a defrosting operation is performed based on the rate of change of the current.

[0104] If the rate of change of the current increases, the compressor of the air conditioner is controlled to reduce its frequency.

[0105] If the rate of change of the current continues to increase within a preset time period, the compressor is controlled to stop.

[0106] When it is determined that the evaporator inlet is frosted, the current change rate is continuously calculated. When the current change rate increases, the frequency of the air conditioner compressor is controlled to be reduced rapidly. If the current change rate increases within n consecutive calculation periods, the compressor is controlled to stop to perform defrosting operation.

[0107] The defrosting control method provided in this invention determines the evaporator's frosting status by detecting the operating mode, ambient temperature, fan speed, operating time, indoor fan current, and evaporator pipe temperature, and then controls the entire unit to perform anti-freezing and defrosting actions. Specifically, the initial operating time is determined by detecting the operating mode, ambient temperature, and fan speed; the change in fan current speed during the initial operating time is calculated; and the rate of change is used to determine whether the evaporator is frosted. When the evaporator is determined to be frosted, the location of the frosting is determined based on the evaporator pipe temperature, and the entire unit is controlled to perform anti-freezing operations based on the location of the frosting.

[0108] Compared to existing technologies that cannot accurately determine whether the evaporator is frosted and are difficult to determine whether the frost has been completely removed, thus affecting the operation of the air conditioner, the defrosting control method provided in this invention can accurately determine whether the evaporator is frosted and the location of the frost, thereby completely defrosting, ensuring the normal operation of the air conditioner, improving the overall reliability of the unit, and optimizing the user experience.

[0109] Example 2

[0110] Figure 3 This diagram illustrates another implementation flow of the defrosting control method provided in an embodiment of the present invention.

[0111] See Figure 3 In a specific example, the defrosting control method provided in this embodiment of the invention is implemented as follows.

[0112] After the air conditioner is turned on, first check if the operating mode is cooling mode and if the fan speed remains unchanged. If the air conditioner is not in cooling mode or the fan speed has changed, then proceed with the corresponding preset program.

[0113] If the air conditioner is operating in cooling mode and the fan speed remains unchanged, then measure the ambient temperature T. 内 The current value I is determined based on the ambient temperature T. 初始 Calculate the running time t 初始 The rate of change of the fan current ΔI over time 初始 And store ΔI 初始 .

[0114] The current value I is detected in real time, the rate of change of current ΔI is calculated every running time t', and ΔI and ΔI' are compared. 初始 The magnitude relationship. If ΔI is less than or equal to ΔI 初始Then, the steps of monitoring the rate of change of current and comparing the magnitude of the rate of change are executed repeatedly.

[0115] If ΔI>ΔI 初始 Determine T 管 With T 管预设 The size relationship.

[0116] If T 管 >T 管预设 If frost forms at the heat exchanger inlet, anti-freezing action 2 is initiated, and ΔI is continuously calculated. If the frost does not increase, the compressor frequency is controlled to decrease at a constant speed; if the frost increases, the compressor frequency is controlled to decrease rapidly, and after continuous operation for n t' hours, the compressor is stopped for defrosting.

[0117] On the other hand, if T 管 Less than or equal to T 管预设 If the coil is frosted, anti-freeze action 1 is initiated. Detect T. 管 If T 管 Less than or equal to T 管预设3 If T 管 Less than or equal to T 管预设2 If T 管 >T 管预测2 And T 管 >T 管预测3 Then, the compressor frequency is controlled to reduce the frequency to a constant speed.

[0118] In summary, the defrosting control method provided by the embodiments of the present invention can accurately determine whether the evaporator is frosted and the location of the frosting, thereby thoroughly defrosting, ensuring the normal operation of the air conditioner, improving the overall reliability of the unit, and optimizing the user experience.

[0119] Example 3

[0120] Figure 4 A schematic diagram of the defrosting control device provided in an embodiment of the present invention is shown.

[0121] See Figure 4 The defrosting control device provided in this embodiment of the invention may include:

[0122] The current change rate acquisition module 201 is used to monitor the current change rate of the fan when the air conditioner is in a stable operating state; the stable operating state is the operating state of the air conditioner after a preset initial time has elapsed since it was turned on.

[0123] The frosting determination module 202 is used to determine that the evaporator of the air conditioner is frosted when the rate of change of the current is greater than a pre-stored rate of change threshold.

[0124] The defrosting control module 203 is used to detect the evaporator tube temperature and perform evaporator defrosting operation based on the evaporator tube temperature.

[0125] In some embodiments, the apparatus further includes a rate of change threshold acquisition module, configured to:

[0126] In response to the power-on command, determine whether the air conditioner is in cooling mode;

[0127] When the operating mode is cooling mode, the current ambient temperature is detected;

[0128] The duration of the initial time is determined based on the pre-stored correspondence between ambient temperature and initial duration.

[0129] The rate of change of the wind turbine current within the initial time period is used as the rate of change threshold.

[0130] In some embodiments, the frosting control module 203 includes:

[0131] The frost location determination unit is used to determine the frost location of the evaporator based on the evaporator tube temperature.

[0132] A defrosting operation control unit is used to perform evaporator defrosting operation based on the frosting location.

[0133] In some embodiments, the frosting location determination unit is specifically used for:

[0134] If the evaporator coil temperature is less than or equal to a pre-stored temperature threshold, then the evaporator coil is determined to be frosted.

[0135] If the evaporator tube temperature is greater than the pre-stored temperature judgment threshold, then it is determined that the evaporator inlet is frosted.

[0136] In some embodiments, the defrosting operation control unit is specifically used for:

[0137] When the coils of the evaporator are frosted, a defrosting operation is performed based on the temperature of the evaporator coils.

[0138] If the evaporator tube temperature is less than or equal to a first temperature threshold and greater than a second temperature threshold, then the compressor of the air conditioner is controlled to reduce its frequency at a first speed.

[0139] If the evaporator tube temperature is less than or equal to the second temperature threshold and greater than the third temperature threshold, then the compressor is controlled to reduce its frequency at a second speed, which is greater than the first speed.

[0140] If the evaporator tube temperature is lower than the third temperature threshold, the compressor is controlled to stop.

[0141] In some embodiments, the defrosting operation control unit is further configured to:

[0142] When the inlet of the evaporator is frosted, a defrosting operation is performed based on the rate of change of the current.

[0143] If the rate of change of the current increases, the compressor of the air conditioner is controlled to reduce its frequency.

[0144] If the rate of change of the current continues to increase within a preset time period, the compressor is controlled to stop.

[0145] In summary, the defrosting control device provided in this embodiment of the invention can accurately determine whether the evaporator is frosted and the location of the frosting, thereby thoroughly defrosting, ensuring the normal operation of the air conditioner, improving the overall reliability of the unit, and optimizing the user experience.

[0146] Example 4

[0147] Figure 5 This application shows a schematic diagram of the structure of a computer device provided in an exemplary embodiment, the computer device comprising:

[0148] The processor 301 includes one or more processing cores. The processor 301 executes various functional applications and data processing by running software programs and modules.

[0149] The receiver 302 and transmitter 303 can be implemented as a communication component, which can be a communication chip. Optionally, this communication component can include signal transmission functionality. That is, the transmitter 303 can be used to transmit control signals to the image acquisition device and the scanning device, and the receiver 302 can be used to receive corresponding feedback commands.

[0150] The memory 304 is connected to the processor 301 via the bus 305.

[0151] The memory 304 can be used to store at least one instruction, and the processor 301 is used to execute the at least one instruction to implement steps 101 to 102 in the above-described defrosting control method embodiment.

[0152] Those skilled in the art will understand that Figure 5 This is merely an example of a computer device and does not constitute a limitation on the computer device. It may include more or fewer components than shown, or combine certain components, or different components. For example, the computer device may also include network access devices, etc.

[0153] The processor 301 may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0154] The memory 304 can be an internal storage unit of the computer device, such as a hard drive or RAM. The memory 304 can also be an external storage device of the computer device, such as a plug-in hard drive, Smart Media Card (SMC), Secure Digital (SD) card, or Flash Card. Furthermore, the memory 304 can include both internal and external storage units. The memory 304 is used to store the computer program and other programs and data required by the terminal device. The memory 304 can also be used to temporarily store data that has been output or will be output.

[0155] Example 5

[0156] This application also provides an air conditioner, including the computer device described above.

[0157] Example 6

[0158] This application also provides a computer-readable storage medium storing at least one instruction, at least one program, code set, or instruction set, which can be loaded and executed by a processor to implement the above-described defrosting control method.

[0159] Optionally, the computer-readable storage medium may include: read-only memory (ROM), random access memory (RAM), solid-state drives (SSDs), or optical discs, etc. The random access memory may include resistive random access memory (ReRAM) and dynamic random access memory (DRAM).

[0160] Example 7

[0161] This application also provides a computer program product or computer program including computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform any of the defrosting control methods described in the above embodiments.

[0162] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the implementation.

[0163] Those skilled in the art will understand that all or part of the steps of the above embodiments can be implemented by hardware, or by a program instructing related hardware. The program can be stored in a computer-readable storage medium, such as a read-only memory, a disk, or an optical disk. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is used as an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0164] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0165] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0166] The computer program includes computer program code, which can be in the form of source code, object code, executable file, or some intermediate form. The computer-readable medium can include any entity or device capable of carrying the computer program code, recording media, USB flash drive, portable hard drive, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content included in the computer-readable medium can be appropriately added or removed according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electrical carrier signals and telecommunication signals.

[0167] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included within the protection scope of the present invention.

Claims

1. A defrosting control method, characterized in that, The method includes: When the air conditioner is in a stable operating state, the rate of change of the fan current is monitored; the stable operating state is the operating state of the air conditioner after a preset initial time has elapsed since it was turned on. When the rate of change of the current is greater than a pre-stored rate of change threshold, it is determined that the evaporator of the air conditioner is frosted. The evaporator tube temperature is detected, and the evaporator defrosting operation is performed based on the evaporator tube temperature; Prior to monitoring the rate of change of the current in the wind turbine, the method further includes: In response to the power-on command, determine whether the air conditioner is in cooling mode; when the operating mode is cooling mode and the fan speed remains unchanged, detect the current ambient temperature; based on the pre-stored correspondence between ambient temperature and initial duration, determine the duration of the initial time corresponding to the current ambient temperature; use the rate of change of fan current within the initial time as the rate of change threshold. The evaporator defrosting operation based on the evaporator tube temperature includes: The location of frost on the evaporator is determined based on the evaporator tube temperature; the evaporator defrosting operation is performed based on the frost location, specifically including different defrosting and antifreeze operations according to different frost locations.

2. The method according to claim 1, characterized in that, The method of determining the location of frost on the evaporator based on the evaporator tube temperature includes: If the evaporator coil temperature is less than or equal to a pre-stored temperature threshold, then the evaporator coil is determined to be frosted. If the evaporator tube temperature is greater than the pre-stored temperature judgment threshold, then it is determined that the evaporator inlet is frosted.

3. The method according to claim 2, characterized in that, The evaporator defrosting operation based on the frosted location includes: When the coils of the evaporator are frosted, a defrosting operation is performed based on the temperature of the evaporator coils. If the evaporator tube temperature is less than or equal to a first temperature threshold and greater than a second temperature threshold, then the compressor of the air conditioner is controlled to reduce its frequency at a first speed. If the evaporator tube temperature is less than or equal to the second temperature threshold and greater than the third temperature threshold, then the compressor is controlled to reduce its frequency at a second speed, which is greater than the first speed. If the evaporator tube temperature is lower than the third temperature threshold, the compressor is controlled to stop.

4. The method according to claim 2, characterized in that, The evaporator defrosting operation based on the frosted location includes: When the inlet of the evaporator is frosted, a defrosting operation is performed based on the rate of change of the current. If the rate of change of the current increases, the compressor of the air conditioner is controlled to reduce its frequency. If the rate of change of the current continues to increase within a preset time period, the compressor is controlled to stop.

5. A defrosting control device, characterized in that, The device includes: The current change rate acquisition module is used to monitor the current change rate of the fan when the air conditioner is in a stable operating state; the stable operating state is the operating state of the air conditioner after a preset initial time has elapsed since it was turned on. The frosting detection module is used to determine that the evaporator of the air conditioner is frosted when the rate of change of the current is greater than a pre-stored rate of change threshold. The defrost control module is used to detect the evaporator tube temperature and perform evaporator defrost operation based on the evaporator tube temperature. Before monitoring the rate of change of the fan current, the device is also used to: In response to the power-on command, determine whether the air conditioner is in cooling mode; when the operating mode is cooling mode and the fan speed remains unchanged, detect the current ambient temperature; based on the pre-stored correspondence between ambient temperature and initial duration, determine the duration of the initial time corresponding to the current ambient temperature; use the rate of change of fan current within the initial time as the rate of change threshold. The evaporator defrosting operation based on the evaporator tube temperature includes: The location of frost on the evaporator is determined based on the evaporator tube temperature; the evaporator defrosting operation is performed based on the frost location, specifically including different defrosting and antifreeze operations according to different frost locations.

6. A computer device, characterized in that, The computer device includes a processor and a memory, the memory storing at least one instruction, at least one program, code set, or instruction set, the at least one instruction, at least one program, code set, or instruction set being loaded and executed by the processor to implement the defrosting control method as described in any one of claims 1 to 4.

7. An air conditioner, characterized in that, Includes the computer device as described in claim 6.

8. A computer-readable storage medium, characterized in that, The readable storage medium stores at least one instruction, at least one program, code set, or instruction set, which is loaded and executed by a processor to implement the defrosting control method as described in any one of claims 1 to 4.

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