Air conditioner defrosting control method, control device, electronic device and air conditioning system

Abstract

The application provides a defrosting control method and device of an air conditioner, an electronic device and an air conditioner system. The control method comprises: obtaining a coil temperature of an outdoor condenser of the air conditioner when the air conditioner is running in a heating mode for a predetermined time length, obtaining a first target outdoor coil temperature, obtaining a target rotating speed of an outdoor fan of the air conditioner, obtaining a target rotating speed, and obtaining a target frequency of a compressor of the air conditioner; obtaining a coil temperature at a current time, obtaining a second target outdoor coil temperature; inputting the first target outdoor coil temperature, the target rotating speed and the target frequency into a defrosting calculation model to obtain a target defrosting outdoor coil temperature; and controlling the air conditioner to enter a defrosting mode when the second target outdoor coil temperature is less than the target defrosting outdoor coil temperature. The application solves the problem of poor defrosting effect of the air conditioner when the outdoor environment temperature is not detected in the prior art.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and more specifically, to a control method, control device, electronic device, and air conditioning system for defrosting an air conditioner. Background Technology

[0002] When an air conditioner is heating, frost is likely to form. Frost can hinder the heat exchange process of the outdoor heat exchanger and affect the performance of the air conditioner. Defrosting is often required, but this process can cause the indoor temperature to drop, affecting comfort. Therefore, controlling the timing of defrosting has a significant impact on the comfort of air conditioning heating and is a popular research area.

[0003] Existing defrosting timing control logics vary widely, but they generally determine whether defrosting is needed based on the difference between the ambient temperature and the external pipe temperature. If the outdoor ambient temperature parameter is missing, the defrosting timing determination will be inaccurate. To obtain the outdoor ambient temperature parameter, corresponding sensors need to be added for measurement, which increases costs. Summary of the Invention

[0004] The main objective of this application is to provide a control method, control device, electronic device, and air conditioning system for air conditioner defrosting, so as to at least solve the problem of poor defrosting effect of air conditioners when the outdoor ambient temperature is not detected in the prior art.

[0005] To achieve the above objectives, according to one aspect of this application, a defrosting control method for an air conditioner is provided, comprising: when the air conditioner is running in heating mode for a predetermined period of time, acquiring the coil temperature of the outdoor condenser of the air conditioner to obtain a first target external pipe temperature, acquiring the speed of the outdoor fan of the air conditioner to obtain a target speed, and acquiring the operating frequency of the compressor of the air conditioner to obtain a target frequency; acquiring the coil temperature at the current moment to obtain a second target external pipe temperature, wherein the current moment is later than the moment when the air conditioner is running for the predetermined period of time; inputting the first target external pipe temperature, the target speed, and the target frequency into a defrosting calculation model to obtain a target defrosting external pipe temperature, wherein the target defrosting external pipe temperature is the coil temperature at which the heat exchange power of the heat exchanger of the air conditioner decreases by a predetermined value due to frost formation on the outdoor condenser, and the defrosting calculation model is a model characterizing the relationship between the defrosting external pipe temperature, the coil temperature, the outdoor fan speed, and the compressor operating frequency; and controlling the air conditioner to enter defrosting mode when the second target external pipe temperature is lower than the target defrosting external pipe temperature.

[0006] Optionally, inputting the first target external pipe temperature, the target rotational speed, and the target frequency into the defrosting calculation model to obtain the target defrosting external pipe temperature includes: inputting the first target external pipe temperature, the target rotational speed, and the target frequency into the calculation formula T. 化霜 =a×T t+b×F t –c×N t In –d, the target defrosting outer tube temperature is obtained, where T t For the first target external pipe temperature, F t For the target frequency, N t Let a, b, c, and d be the target rotational speed, and a, b, c, and d be coefficients.

[0007] Optionally, the value range of a is (0.8 to 1.2), the value range of b is (0.02 to 0.05), the value range of c is (0.001 to 0.003), and the value range of d is (5 to 7).

[0008] Optionally, the control method further includes: controlling the air conditioner to enter non-defrosting mode when the second target external pipe temperature is greater than or equal to the target defrosting external pipe temperature.

[0009] Optionally, when the second target external pipe temperature is greater than or equal to the target defrosting external pipe temperature, controlling the air conditioner to enter a non-defrosting mode includes: when the second target external pipe temperature is greater than or equal to the target defrosting external pipe temperature, performing at least one of the following based on the difference between the second target external pipe temperature and the target defrosting external pipe temperature: reducing the speed of the external fan, increasing the operating frequency of the compressor, and increasing the opening of the throttle valve.

[0010] Optionally, when the second target external pipe temperature is lower than the target defrosting external pipe temperature, controlling the air conditioner to enter defrosting mode includes: when the second target external pipe temperature is lower than the target defrosting external pipe temperature, determining the degree of frost on the air conditioner based on the difference between the target defrosting external pipe temperature and the second target external pipe temperature; and controlling the operation of the air conditioner based on the degree of frost.

[0011] Optionally, controlling the operation of the air conditioner according to the degree of frost includes: determining defrosting parameters of the defrosting mode according to the degree of frost, wherein the defrosting parameters include defrosting duration, compressor operating frequency, and throttle valve opening; and controlling the air conditioner to operate with the defrosting parameters.

[0012] According to another aspect of this application, an air conditioner defrosting control device is provided, comprising: a first acquisition unit, configured to acquire the coil temperature of the outdoor condenser of the air conditioner to obtain a first target external pipe temperature, acquire the outdoor fan speed of the air conditioner to obtain a target speed, and acquire the compressor operating frequency of the air conditioner to obtain a target frequency when the air conditioner is running in heating mode for a predetermined period of time; a second acquisition unit, configured to acquire the coil temperature at the current moment to obtain a second target external pipe temperature, wherein the current moment is later than the moment when the air conditioner is running for the predetermined period of time; an input unit, configured to input the first target external pipe temperature, the target speed, and the target frequency into a defrosting calculation model to obtain a target defrosting external pipe temperature, wherein the target defrosting external pipe temperature is the coil temperature at which the heat exchange power of the air conditioner's heat exchanger decreases by a predetermined value due to frost formation on the outdoor condenser, and the defrosting calculation model is a model characterizing the relationship between the defrosting external pipe temperature, the coil temperature, the outdoor fan speed, and the compressor operating frequency; and a first control unit, configured to control the air conditioner to enter defrosting mode when the second target external pipe temperature is lower than the target defrosting external pipe temperature.

[0013] According to another aspect of this application, an electronic device is provided, comprising: one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs including methods for performing any of the control methods described above.

[0014] According to another aspect of this application, an air conditioning system is provided, comprising: an air conditioner including a condenser, an outdoor fan, a compressor, and a heat exchanger; and a controller for executing any of the control methods described above.

[0015] Applying the technical solution of this application, firstly, when the air conditioner is running in heating mode for a predetermined time, the coil temperature of the outdoor condenser of the air conditioner is obtained to obtain the first target external pipe temperature, the speed of the outdoor fan of the air conditioner is obtained to obtain the target speed, the operating frequency of the compressor of the air conditioner is obtained to obtain the target frequency, and the coil temperature at the current moment is obtained to obtain the second target external pipe temperature. Then, the first target external pipe temperature, the target speed, and the target frequency are input into the defrosting calculation model to obtain the target defrosting external pipe temperature. Finally, if the second target external pipe temperature is lower than the target defrosting external pipe temperature, it indicates that the air conditioner's frost has caused the heat exchanger's heat exchange power to decrease by more than a predetermined value, and at this time, the air conditioner is controlled to enter the defrosting mode. Compared to existing technologies where air conditioner defrosting is poor when outdoor ambient temperature is not detected, this application, without outdoor ambient temperature parameters, obtains three parameters—a first target external pipe temperature, a target rotation speed, and a target frequency—and inputs these three parameters into a defrosting calculation model that characterizes the relationship between these three parameters and the coil temperature at which the heat exchanger's heat exchange power decreases by a predetermined value due to air conditioner frost. This allows for a more accurate determination of the external pipe temperature at which the heat exchanger's heat exchange power decreases by a predetermined value under the corresponding operating conditions. Based on the calculated relationship between the external pipe temperature at which the heat exchanger's heat exchange power decreases by a predetermined value due to air conditioner frost and the real-time external pipe temperature of the air conditioner, the timing of the air conditioner entering defrosting can be controlled more accurately, thus ensuring a better defrosting effect. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0017] Figure 1 A hardware structure block diagram of a mobile terminal for performing an air conditioner defrosting control method is shown in an embodiment of this application;

[0018] Figure 2 A schematic flowchart of an air conditioner defrosting control method according to an embodiment of this application is shown;

[0019] Figure 3 A flowchart illustrating a specific air conditioner defrosting control method according to an embodiment of this application is shown.

[0020] Figure 4 A structural block diagram of an air conditioner defrosting control device according to an embodiment of this application is shown;

[0021] Figure 5 A schematic diagram of a partial air conditioning system provided according to an embodiment of this application is shown.

[0022] The above figures include the following reference numerals:

[0023] 102. Processor; 104. Memory; 106. Transmission device; 108. Input / output device. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0026] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0027] As described in the background section, the defrosting effect of air conditioners is poor when the outdoor ambient temperature is not detected. To solve the above problem, the embodiments of this application provide an air conditioner defrosting control method, control device, electronic device and air conditioning system.

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0029] The methods and embodiments provided in this application can be executed on a mobile terminal, computer terminal, or similar computing device. Taking running on a mobile terminal as an example, Figure 1 This is a hardware structure block diagram of a mobile terminal for an air conditioner defrosting control method according to an embodiment of the present invention. Figure 1 As shown, a mobile terminal may include one or more ( Figure 1Only one is shown in the diagram. A processor 102 (which may include, but is not limited to, a microprocessor MCU or a programmable logic device FPGA, etc.) and a memory 104 for storing data are also shown. The mobile terminal may further include a transmission device 106 for communication functions and an input / output device 108. Those skilled in the art will understand that... Figure 1 The structure shown is for illustrative purposes only and does not limit the structure of the mobile terminal described above. For example, the mobile terminal may also include components that are more... Figure 1 The more or fewer components shown, or having the same Figure 1 The different configurations shown.

[0030] The memory 104 can be used to store computer programs, such as application software programs and modules, like the computer program corresponding to the air conditioner defrosting control method in this embodiment of the invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, thereby implementing the above-described method. The memory 104 may include high-speed random access memory and non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory remotely located relative to the processor 102, and these remote memories can be connected to the mobile terminal via a network. Examples of the aforementioned networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof. The transmission device 106 is used to receive or send data via a network. Specific examples of the aforementioned networks may include wireless networks provided by the mobile terminal's communication provider. In one example, the transmission device 106 includes a network interface controller (NIC), which can be connected to other network devices via a base station to communicate with the Internet. In one example, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0031] This embodiment provides a control method for defrosting an air conditioner that runs on a mobile terminal, computer terminal, or similar computing device. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Also, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0032] Figure 2 This is a flowchart of an air conditioner defrosting control method according to an embodiment of this application. Figure 2 As shown, the method includes the following steps:

[0033] Step S201: When the air conditioner is running in heating mode for a predetermined time, the coil temperature of the outdoor condenser of the air conditioner is obtained to obtain the first target outdoor coil temperature, the speed of the outdoor fan of the air conditioner is obtained to obtain the target speed, and the operating frequency of the compressor of the air conditioner is obtained to obtain the target frequency.

[0034] Specifically, the coil temperature can be obtained through a temperature sensor inside the air conditioner, or through a temperature sensor located at the coil position on the outdoor condenser. Since the model of the drive device, such as the motor that drives the outdoor fan and compressor, is fixed information, the outdoor fan speed and compressor operating frequency are related to the parameters of the motor itself, such as voltage and current. Therefore, the outdoor fan speed and compressor operating frequency can be calculated based on the corresponding motor model information and operating parameters.

[0035] In practical applications, those skilled in the art can set the above-mentioned predetermined duration based on experience, or it can be obtained through multiple experiments. This application does not impose any specific restrictions on this.

[0036] In this embodiment of the application, the predetermined duration is 20 minutes.

[0037] Step S202: Obtain the current coil temperature to obtain the second target external tube temperature. The current time is later than the time when the predetermined running time is reached.

[0038] Specifically, if the time when the above-mentioned predetermined duration is reached is 8:30, then the above-mentioned current time can be 8:31, 8:32, or any other time later than the time when the above-mentioned predetermined duration is reached.

[0039] Step S203: Input the first target external pipe temperature, the target rotation speed, and the target frequency into the defrosting calculation model to obtain the target defrosting external pipe temperature. The target defrosting external pipe temperature is the coil temperature when the heat exchange power of the air conditioner decreases by a predetermined value due to the outdoor condenser frosting. The defrosting calculation model is a model that characterizes the relationship between the defrosting external pipe temperature, the coil temperature, the outdoor fan speed, and the compressor operating frequency.

[0040] In practical applications, those skilled in the art can set the above-mentioned predetermined values ​​based on experience, or obtain them through multiple experiments. This application does not impose any specific restrictions on this.

[0041] In this embodiment, the predetermined value is 10%.

[0042] Step S204: When the second target external pipe temperature is lower than the target defrosting external pipe temperature, control the air conditioner to enter defrosting mode.

[0043] Through the above embodiments, firstly, when the air conditioner is running in heating mode for a predetermined period of time, the coil temperature of the outdoor condenser of the air conditioner is obtained to obtain the first target external pipe temperature, the speed of the outdoor fan of the air conditioner is obtained to obtain the target speed, the operating frequency of the air conditioner compressor is obtained to obtain the target frequency, and the coil temperature at the current moment is obtained to obtain the second target external pipe temperature. Then, the first target external pipe temperature, the target speed, and the target frequency are input into the defrosting calculation model to obtain the target defrosting external pipe temperature. Finally, if the second target external pipe temperature is less than the target defrosting external pipe temperature, it indicates that the air conditioner's frost has caused the heat exchanger's heat exchange power to decrease by more than a predetermined value, and at this time, the air conditioner is controlled to enter the defrosting mode. Compared to existing technologies where air conditioner defrosting is poor when outdoor ambient temperature is not detected, this application, without outdoor ambient temperature parameters, obtains three parameters—a first target external pipe temperature, a target rotation speed, and a target frequency—and inputs these three parameters into a defrosting calculation model that characterizes the relationship between these three parameters and the coil temperature at which the heat exchanger's heat exchange power decreases by a predetermined value due to air conditioner frost. This allows for a more accurate determination of the external pipe temperature at which the heat exchanger's heat exchange power decreases by a predetermined value under the corresponding operating conditions. Based on the calculated relationship between the external pipe temperature at which the heat exchanger's heat exchange power decreases by a predetermined value due to air conditioner frost and the real-time external pipe temperature of the air conditioner, the timing of the air conditioner entering defrosting can be controlled more accurately, thus ensuring a better defrosting effect.

[0044] In addition, since this application does not require obtaining outdoor ambient temperature parameters, it does not require adding a corresponding temperature sensor to measure outdoor ambient temperature parameters, thus avoiding the additional production costs caused by configuring an outdoor temperature sensor and reducing the manufacturing cost of the air conditioner.

[0045] In one alternative approach, the first target external pipe temperature, the target rotational speed, and the target frequency are input into the defrosting calculation model to obtain the target defrosting external pipe temperature. This includes: inputting the first target external pipe temperature, the target rotational speed, and the target frequency into the calculation formula T. 化霜 =a×T t +b×F t –c×N t In –d, the target defrosting external pipe temperature is obtained, where T t For the aforementioned first target external pipe temperature, F t For the target frequency mentioned above, N t The target rotational speed is given by the formula, where a, b, c, and d are coefficients. In this embodiment, the first target external pipe temperature, the target rotational speed, and the target frequency are input into the calculation formula T. 化霜 =a×T t +b×F t –c×N t In –d, the target defrosting external pipe temperature is obtained, where the calculation formula T 化霜 =a×Tt +b×F t –c×N t –d further ensures the accuracy of the calculated target defrosting external pipe temperature, thereby further improving the accuracy of the defrosting timing determined based on the relationship between the target defrosting external pipe temperature and the second target external pipe temperature.

[0046] Specifically, the above calculation formula is obtained by fitting multiple sets of historical data. Each set of historical data includes: the defrosting external pipe temperature at the historical moment, the coil temperature corresponding to the defrosting external pipe temperature, the external fan speed, and the compressor operating frequency.

[0047] In other embodiments, inputting the first target external pipe temperature, the target rotation speed, and the target frequency into the defrosting calculation model to obtain the target defrosting external pipe temperature may further include: inputting the first target external pipe temperature, the target rotation speed, and the target frequency into a neural network model, so that the neural network model analyzes the first target external pipe temperature, the target rotation speed, and the target frequency to obtain the target defrosting external pipe temperature. The neural network model is trained using multiple sets of data through neural network learning, and each set of data includes: the defrosting external pipe temperature and the corresponding coil temperature, the external fan speed, and the compressor operating frequency.

[0048] In an exemplary embodiment of this application, by fitting and calculating a large number of historical defrost external pipe temperatures and the corresponding historical coil temperatures, historical outdoor fan speeds, and historical compressor operating frequencies, the coefficients of the calculation formula are determined as follows: the value range of a is (0.8~1.2), the value range of b is (0.02~0.05), the value range of c is (0.001~0.003), and the value range of d is (5~7). In this embodiment, the value ranges of a, b, c, and d further ensure that the calculation formula is more accurate, further ensure that the calculated target defrost external pipe temperature is more accurate, and further make the determination of the air conditioner defrosting timing more accurate.

[0049] In practical applications, the value ranges of a, b, c, and d may vary depending on the air conditioner model. Those skilled in the art can obtain the historical defrost external pipe temperature for different air conditioner models, along with the corresponding historical coil temperature, historical external fan speed, and historical compressor operating frequency, for fitting calculations.

[0050] According to some exemplary embodiments of this application, the control method further includes: controlling the air conditioner to enter a non-defrosting mode when the second target external pipe temperature is greater than or equal to the target defrosting external pipe temperature. In this embodiment, when the second target external pipe temperature is greater than or equal to the target defrosting external pipe temperature, it indicates that the air conditioner has not yet entered the stage where the heat exchange power of the heat exchanger decreases by a predetermined value due to frost formation, and at this time, it is not necessary to control the air conditioner to enter the defrosting mode.

[0051] Specifically, controlling the air conditioner to enter non-defrost mode means not controlling the air conditioner to enter defrost mode.

[0052] According to some exemplary embodiments of this application, when the second target external pipe temperature is greater than or equal to the target defrosting external pipe temperature, controlling the air conditioner to enter a non-defrosting mode includes: when the second target external pipe temperature is greater than or equal to the target defrosting external pipe temperature, performing at least one of the following based on the difference between the second target external pipe temperature and the target defrosting external pipe temperature: reducing the speed of the external fan, increasing the operating frequency of the compressor, and increasing the opening of the throttle valve. In the embodiments of this application, by performing at least one of the following based on the difference between the second target external pipe temperature and the target defrosting external pipe temperature when the second target external pipe temperature is greater than or equal to the target defrosting external pipe temperature: reducing the speed of the external fan, increasing the operating frequency of the compressor, and increasing the opening of the throttle valve, the tendency of the air conditioner to enter the stage where the heat exchange power of the heat exchanger decreases by a predetermined value due to frost can be mitigated. That is, the frost trend of the air conditioner is intervened before the heat exchange power of the heat exchanger decreases by a predetermined value due to frost, further ensuring a better heat exchange effect of the air conditioner, thereby improving the performance of the air conditioner.

[0053] In some alternative solutions of this application, when the second target external pipe temperature is lower than the target defrosting external pipe temperature, controlling the air conditioner to enter defrosting mode includes: determining the degree of frost on the air conditioner based on the difference between the target defrosting external pipe temperature and the second target external pipe temperature when the second target external pipe temperature is lower than the target defrosting external pipe temperature; and controlling the operation of the air conditioner based on the degree of frost. In this embodiment, by first determining the degree of frost on the air conditioner based on the difference between the target defrosting external pipe temperature and the second target external pipe temperature when the second target external pipe temperature is lower than the target defrosting external pipe temperature, and then controlling the operation of the air conditioner based on the degree of frost, the operating parameters of the air conditioner can be more closely matched with the degree of frost, avoiding problems such as incomplete defrosting or over-defrosting when they are mismatched, and also avoiding resource waste caused by over-defrosting.

[0054] Specifically, different degrees of frost correspond to different differences between the target defrosting external tube temperature and the second target external tube temperature. The greater the difference, the more severe the frost.

[0055] In some alternative embodiments of this application, controlling the operation of the air conditioner based on the degree of frost includes: determining the defrosting parameters of the defrosting mode based on the degree of frost, wherein the defrosting parameters include defrosting duration, compressor operating frequency, and throttle valve opening; and controlling the air conditioner to operate with the defrosting parameters. In this embodiment, by determining the defrosting parameters of the defrosting mode based on the degree of frost, the defrosting parameters of the air conditioner's defrosting mode can be adjusted in a timely manner to parameter values ​​that are compatible with the degree of frost on the outdoor unit of the air conditioner, thereby further ensuring a better defrosting effect on the outdoor unit when the air conditioner is operating in defrosting mode.

[0056] Specifically, if the defrosting parameter is the defrosting time of the defrosting mode, the defrosting time will be extended as the degree of frost increases, so that the air conditioner has enough time to melt the frost condensed on the outdoor unit when running the defrosting mode; if the defrosting parameter is the compressor operating frequency, the compressor operating frequency will be increased as the degree of frost increases; if the defrosting parameter is the throttle valve opening, the throttle valve opening will be increased as the degree of frost increases.

[0057] To enable those skilled in the art to better understand the technical solution of this application, the implementation process of the air conditioning defrosting control method of this application will be described in detail below with reference to specific embodiments.

[0058] This embodiment relates to a specific method for controlling air conditioner defrosting, such as... Figure 3 As shown, it includes the following steps:

[0059] Step S1: When the air conditioner is running in heating mode for a predetermined time, obtain the coil temperature of the outdoor condenser of the air conditioner to obtain the first target outdoor coil temperature, obtain the outdoor fan speed of the air conditioner to obtain the target speed, and obtain the compressor operating frequency of the air conditioner to obtain the target frequency.

[0060] Step S2: Obtain the current coil temperature to get the second target external tube temperature. The current time is later than the time when the predetermined running time is reached.

[0061] Step S3: Input the first target external pipe temperature, target rotational speed, and target frequency into the calculation formula T. 化霜 =a×T t +b×F t –c×N t In –d, the target defrosting external pipe temperature is obtained. The target defrosting external pipe temperature is the coil temperature when the heat exchange power of the air conditioner's heat exchanger decreases by 10% due to the outdoor condenser being frosted.

[0062] Step S4: Determine whether the temperature of the second target external pipe is lower than the temperature of the target defrosting external pipe;

[0063] Step S5: If the second target external pipe temperature is lower than the target defrosting external pipe temperature, control the air conditioner to enter defrosting mode; if the second target external pipe temperature is greater than or equal to the target defrosting external pipe temperature, control the air conditioner to enter non-defrosting mode.

[0064] It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0065] This application also provides a control device for air conditioner defrosting. It should be noted that the air conditioner defrosting control device of this application can be used to execute the control method for air conditioner defrosting provided in this application. This device is used to implement the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0066] The following describes the air conditioning defrosting control device provided in the embodiments of this application.

[0067] Figure 4 This is a schematic diagram of an air conditioner defrosting control device according to an embodiment of this application. Figure 4 As shown, the device includes:

[0068] The first acquisition unit 10 is used to acquire the coil temperature of the outdoor condenser of the air conditioner and obtain a first target outdoor coil temperature, acquire the outdoor fan speed of the air conditioner and obtain a target speed, and acquire the compressor operating frequency of the air conditioner and obtain a target frequency when the air conditioner is running in heating mode for a predetermined time.

[0069] Specifically, the coil temperature can be obtained through a temperature sensor inside the air conditioner, or through a temperature sensor located at the coil position on the outdoor condenser. Since the model of the drive device, such as the motor that drives the outdoor fan and compressor, is fixed information, the outdoor fan speed and compressor operating frequency are related to the parameters of the motor itself, such as voltage and current. Therefore, the outdoor fan speed and compressor operating frequency can be calculated based on the corresponding motor model information and operating parameters.

[0070] In practical applications, those skilled in the art can set the above-mentioned predetermined duration based on experience, or it can be obtained through multiple experiments. This application does not impose any specific restrictions on this.

[0071] In this embodiment of the application, the predetermined duration is 20 minutes.

[0072] The second acquisition unit 20 is used to acquire the current coil temperature and obtain the second target outer tube temperature. The current time is later than the time when the predetermined running time is reached.

[0073] Specifically, if the time when the above-mentioned predetermined duration is reached is 8:30, then the above-mentioned current time can be 8:31, 8:32, or any other time later than the time when the above-mentioned predetermined duration is reached.

[0074] The input unit 30 is used to input the first target external pipe temperature, the target speed and the target frequency into the defrosting calculation model to obtain the target defrosting external pipe temperature. The target defrosting external pipe temperature is the coil temperature when the heat exchange power of the air conditioner decreases by a predetermined value due to the outdoor condenser frosting. The defrosting calculation model is a model that characterizes the relationship between the defrosting external pipe temperature, the coil temperature, the outdoor fan speed and the compressor operating frequency.

[0075] In practical applications, those skilled in the art can set the above-mentioned predetermined values ​​based on experience, or obtain them through multiple experiments. This application does not impose any specific restrictions on this.

[0076] In this embodiment, the predetermined value is 10%.

[0077] The first control unit 40 is used to control the air conditioner to enter the defrosting mode when the second target external pipe temperature is lower than the target defrosting external pipe temperature.

[0078] In the above embodiments, when the air conditioner is running in heating mode for a predetermined period of time, the first acquisition unit acquires the coil temperature of the outdoor condenser of the air conditioner to obtain the first target external pipe temperature, the speed of the outdoor fan of the air conditioner to obtain the target speed, and the operating frequency of the compressor of the air conditioner to obtain the target frequency. The second acquisition unit acquires the coil temperature at the current moment to obtain the second target external pipe temperature. The first target external pipe temperature, the target speed, and the target frequency are input into the defrosting calculation model by the input unit to obtain the target defrosting external pipe temperature. When the second target external pipe temperature is lower than the target defrosting external pipe temperature, it indicates that the air conditioner is frosting and the heat exchange power of the heat exchanger has decreased by more than a predetermined value. At this time, the air conditioner is controlled to enter the defrosting mode. Compared to existing technologies where air conditioner defrosting is poor when outdoor ambient temperature is not detected, this application addresses the issue of poor defrosting performance when outdoor ambient temperature is unavailable. It obtains three parameters—a first target external pipe temperature, a target rotational speed, and a target frequency—and inputs them into a defrosting calculation model that characterizes the relationship between these parameters and the coil temperature at which the heat exchanger's heat exchange power decreases by a predetermined value due to air conditioner frost. This model can more accurately determine the external pipe temperature at which the heat exchanger's heat exchange power decreases by a predetermined value under the corresponding operating conditions. Furthermore, by calculating the relationship between the external pipe temperature at which the heat exchanger's heat exchange power decreases by a predetermined value due to air conditioner frost and the real-time external pipe temperature of the air conditioner, the timing of the defrosting process can be more accurately controlled, thus ensuring a better defrosting effect.

[0079] In addition, since this application does not require obtaining outdoor ambient temperature parameters, it does not require adding a corresponding temperature sensor to measure outdoor ambient temperature parameters, thus avoiding the additional production costs caused by configuring an outdoor temperature sensor and reducing the manufacturing cost of the air conditioner.

[0080] In one alternative embodiment, the input unit includes: a first input module, configured to input the first target external pipe temperature, the target rotational speed, and the target frequency into the calculation formula T. 化霜 =a×T t +b×F t –c×N t In –d, the target defrosting external pipe temperature is obtained, where T t For the aforementioned first target external pipe temperature, F t For the target frequency mentioned above, N t The target rotational speed is given by the formula, where a, b, c, and d are coefficients. In this embodiment, the first target external pipe temperature, the target rotational speed, and the target frequency are input into the calculation formula T. 化霜 =a×T t +b×F t –c×N t In –d, the target defrosting external pipe temperature is obtained, where the calculation formula T 化霜 =a×Tt +b×F t –c×N t –d further ensures the accuracy of the calculated target defrosting external pipe temperature, thereby further improving the accuracy of the defrosting timing determined based on the relationship between the target defrosting external pipe temperature and the second target external pipe temperature.

[0081] Specifically, the above calculation formula is obtained by fitting multiple sets of historical data. Each set of historical data includes: the defrosting external pipe temperature at the historical moment, the coil temperature corresponding to the defrosting external pipe temperature, the external fan speed, and the compressor operating frequency.

[0082] In other embodiments, the input unit may further include a second input module, used to input the first target external pipe temperature, the target rotation speed, and the target frequency into a neural network model, so that the neural network model analyzes the first target external pipe temperature, the target rotation speed, and the target frequency to obtain the target defrosting external pipe temperature. The neural network model is trained using multiple sets of data through neural network learning, and each set of data includes the defrosting external pipe temperature and the corresponding coil temperature, the external fan speed, and the compressor operating frequency.

[0083] In an exemplary embodiment of this application, by fitting and calculating a large number of historical defrost external pipe temperatures and the corresponding historical coil temperatures, historical outdoor fan speeds, and historical compressor operating frequencies, the coefficients of the calculation formula are determined as follows: the value range of a is (0.8~1.2), the value range of b is (0.02~0.05), the value range of c is (0.001~0.003), and the value range of d is (5~7). In this embodiment, the value ranges of a, b, c, and d further ensure that the calculation formula is more accurate, further ensure that the calculated target defrost external pipe temperature is more accurate, and further make the determination of the air conditioner defrosting timing more accurate.

[0084] In practical applications, the value ranges of a, b, c, and d may vary depending on the air conditioner model. Those skilled in the art can obtain the historical defrost external pipe temperature for different air conditioner models, along with the corresponding historical coil temperature, historical external fan speed, and historical compressor operating frequency, for fitting calculations.

[0085] According to some exemplary embodiments of this application, the control device further includes a second control unit, configured to control the air conditioner to enter a non-defrosting mode when the second target external pipe temperature is greater than or equal to the target defrosting external pipe temperature. In this embodiment, when the second target external pipe temperature is greater than or equal to the target defrosting external pipe temperature, it indicates that the air conditioner has not yet entered the stage where the heat exchange power of the heat exchanger decreases by a predetermined value due to frost formation, and at this time, it is not necessary to control the air conditioner to enter the defrosting mode.

[0086] Specifically, controlling the air conditioner to enter non-defrost mode means not controlling the air conditioner to enter defrost mode.

[0087] According to some other exemplary embodiments of this application, the second control unit includes an execution module configured to, when the second target external pipe temperature is greater than or equal to the target defrost external pipe temperature, perform at least one of the following based on the difference between the second target external pipe temperature and the target defrost external pipe temperature: reduce the speed of the external fan, increase the operating frequency of the compressor, and increase the opening of the throttle valve. In this embodiment, by performing at least one of the following actions based on the difference between the second target external pipe temperature and the target defrost external pipe temperature when the second target external pipe temperature is greater than or equal to the target defrost external pipe temperature: reduce the speed of the external fan, increase the operating frequency of the compressor, and increase the opening of the throttle valve, the tendency of the air conditioner to enter the stage where the heat exchange power of the heat exchanger decreases by a predetermined value due to frosting can be mitigated. That is, intervention is initiated on the frosting trend of the air conditioner before the heat exchange power of the heat exchanger decreases by a predetermined value due to frosting, further ensuring better heat exchange effect of the air conditioner and thus improving the performance of the air conditioner.

[0088] In some alternative embodiments of this application, the first control unit includes: a determining module, configured to determine the degree of frosting of the air conditioner based on the difference between the target defrosting external pipe temperature and the second target external pipe temperature when the second target external pipe temperature is lower than the target defrosting external pipe temperature; and a control module, configured to control the operation of the air conditioner based on the degree of frosting. In this embodiment, by determining the degree of frosting of the air conditioner based on the difference between the target defrosting external pipe temperature and the second target external pipe temperature when the second target external pipe temperature is lower than the target defrosting external pipe temperature, and controlling the operation of the air conditioner based on the degree of frosting, the operating parameters of the air conditioner can be more closely matched with the degree of frosting, avoiding problems such as incomplete defrosting or over-defrosting when they are mismatched, and also avoiding resource waste caused by over-defrosting.

[0089] Specifically, different degrees of frost correspond to different differences between the target defrosting external tube temperature and the second target external tube temperature. The greater the difference, the more severe the frost.

[0090] In some alternative embodiments of this application, the control module includes: a determining submodule, used to determine the defrosting parameters of the defrosting mode based on the degree of frost, the defrosting parameters including defrosting duration, compressor operating frequency, and throttle valve opening; and a control submodule, used to control the air conditioner to operate with the defrosting parameters. In this embodiment, by determining the defrosting parameters of the defrosting mode based on the degree of frost, the defrosting parameters of the air conditioner's defrosting mode can be adjusted in a timely manner to parameter values ​​that are compatible with the degree of frost on the outdoor unit of the air conditioner, thereby further ensuring a better defrosting effect on the outdoor unit when the air conditioner operates in defrosting mode.

[0091] Specifically, if the defrosting parameter is the defrosting time of the defrosting mode, the defrosting time will be extended as the degree of frost increases, so that the air conditioner has enough time to melt the frost condensed on the outdoor unit when running the defrosting mode; if the defrosting parameter is the compressor operating frequency, the compressor operating frequency will be increased as the degree of frost increases; if the defrosting parameter is the throttle valve opening, the throttle valve opening will be increased as the degree of frost increases.

[0092] The aforementioned air conditioner defrosting control device includes a processor and a memory. The first acquisition unit, the second acquisition unit, the input unit, and the first control unit are all stored as program units in the memory. The processor executes the program units stored in the memory to achieve the corresponding functions. All of the above modules are located in the same processor; alternatively, the modules may be located in different processors in any combination.

[0093] This application also provides an electronic device, including: one or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs include methods for performing any of the control methods described above.

[0094] This application also provides an air conditioning system, including: an air conditioner, which includes a condenser, an outdoor fan, a compressor, and a heat exchanger; and a controller, which is used to execute any of the above-described control methods.

[0095] The air conditioning system of this application includes any of the above-mentioned control methods. In this control method, firstly, when the air conditioner is running in heating mode for a predetermined time, the coil temperature of the outdoor condenser of the air conditioner is obtained to obtain a first target external pipe temperature, the speed of the outdoor fan of the air conditioner is obtained to obtain a target speed, the operating frequency of the compressor of the air conditioner is obtained to obtain a target frequency, and the coil temperature at the current moment is obtained to obtain a second target external pipe temperature. Then, the first target external pipe temperature, the target speed, and the target frequency are input into the defrosting calculation model to obtain a target defrosting external pipe temperature. Finally, if the second target external pipe temperature is lower than the target defrosting external pipe temperature, it indicates that the air conditioner's frost has caused the heat exchanger's heat exchange power to decrease by more than a predetermined value, and at this time, the air conditioner is controlled to enter defrosting mode. Compared to existing technologies where air conditioner defrosting is poor when outdoor ambient temperature is not detected, this application, without outdoor ambient temperature parameters, obtains three parameters—a first target external pipe temperature, a target rotation speed, and a target frequency—and inputs these three parameters into a defrosting calculation model that characterizes the relationship between these three parameters and the coil temperature at which the heat exchanger's heat exchange power decreases by a predetermined value due to air conditioner frost. This allows for a more accurate determination of the external pipe temperature at which the heat exchanger's heat exchange power decreases by a predetermined value under the corresponding operating conditions. Based on the calculated relationship between the external pipe temperature at which the heat exchanger's heat exchange power decreases by a predetermined value due to air conditioner frost and the real-time external pipe temperature of the air conditioner, the timing of the air conditioner entering defrosting can be controlled more accurately, thus ensuring a better defrosting effect.

[0096] In other embodiments, such as Figure 5 As shown, the air conditioning system also includes an outdoor unit mainboard, which includes a data acquisition module, a defrost calculation module, and a defrost timing control module. The data acquisition module is used to collect the coil temperature of the outdoor condenser, the outdoor fan speed, and the compressor operating frequency obtained through the temperature sensor. The defrost calculation module is used to calculate the defrost timing based on the various data collected by the data acquisition module and the formula T. 化霜 =a×T t +b×F t –c×N t The –d parameter calculates the external tube temperature for defrosting. The defrosting timing control module determines whether to enter defrosting mode based on the relationship between the real-time coil temperature and the calculated external tube temperature.

[0097] It is obvious to those skilled in the art that the modules or steps of the present invention described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. They can be implemented using computer-executable program code, and thus can be stored in a storage device for execution by a computing device. In some cases, the steps shown or described can be performed in a different order than those described herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular combination of hardware and software.

[0098] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0099] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0100] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0101] These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable apparatus for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0102] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0103] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0104] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0105] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0106] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0107] 1) In the defrosting control method of the air conditioner in this application, firstly, when the air conditioner is running in heating mode for a predetermined time, the coil temperature of the outdoor condenser of the air conditioner is obtained to obtain the first target external pipe temperature, the speed of the outdoor fan of the air conditioner is obtained to obtain the target speed, the operating frequency of the compressor of the air conditioner is obtained to obtain the target frequency, and the coil temperature at the current moment is obtained to obtain the second target external pipe temperature. Then, the first target external pipe temperature, the target speed and the target frequency are input into the defrosting calculation model to obtain the target defrosting external pipe temperature. Finally, if the second target external pipe temperature is less than the target defrosting external pipe temperature, it indicates that the air conditioner frost has caused the heat exchange power of the heat exchanger to decrease by more than a predetermined value, and at this time, the air conditioner is controlled to enter the defrosting mode. Compared to existing technologies where air conditioner defrosting is poor when outdoor ambient temperature is not detected, this application, without outdoor ambient temperature parameters, obtains three parameters—a first target external pipe temperature, a target rotation speed, and a target frequency—and inputs these three parameters into a defrosting calculation model that characterizes the relationship between these three parameters and the coil temperature at which the heat exchanger's heat exchange power decreases by a predetermined value due to air conditioner frost. This allows for a more accurate determination of the external pipe temperature at which the heat exchanger's heat exchange power decreases by a predetermined value under the corresponding operating conditions. Based on the calculated relationship between the external pipe temperature at which the heat exchanger's heat exchange power decreases by a predetermined value due to air conditioner frost and the real-time external pipe temperature of the air conditioner, the timing of the air conditioner entering defrosting can be controlled more accurately, thus ensuring a better defrosting effect.

[0108] 2) In the air conditioner defrosting control device of this application, when the air conditioner is running in heating mode for a predetermined time, the first acquisition unit acquires the coil temperature of the outdoor condenser of the air conditioner to obtain the first target external pipe temperature, the speed of the outdoor fan of the air conditioner to obtain the target speed, and the operating frequency of the compressor of the air conditioner to obtain the target frequency. The second acquisition unit acquires the coil temperature at the current moment to obtain the second target external pipe temperature. The first target external pipe temperature, the target speed, and the target frequency are input into the defrosting calculation model through the input unit to obtain the target defrosting external pipe temperature. When the second target external pipe temperature is lower than the target defrosting external pipe temperature, the first control unit indicates that the air conditioner frost has caused the heat exchanger's heat exchange power to decrease by more than a predetermined value. At this time, the air conditioner is controlled to enter the defrosting mode. Compared to existing technologies where air conditioner defrosting is poor when outdoor ambient temperature is not detected, this application addresses the issue of poor defrosting performance when outdoor ambient temperature is unavailable. It obtains three parameters—a first target external pipe temperature, a target rotational speed, and a target frequency—and inputs them into a defrosting calculation model that characterizes the relationship between these parameters and the coil temperature at which the heat exchanger's heat exchange power decreases by a predetermined value due to air conditioner frost. This model can more accurately determine the external pipe temperature at which the heat exchanger's heat exchange power decreases by a predetermined value under the corresponding operating conditions. Furthermore, by calculating the relationship between the external pipe temperature at which the heat exchanger's heat exchange power decreases by a predetermined value due to air conditioner frost and the real-time external pipe temperature of the air conditioner, the timing of the defrosting process can be more accurately controlled, thus ensuring a better defrosting effect.

[0109] 3) The air conditioning system of this application includes any of the above-mentioned control methods. In this control method, firstly, when the air conditioner is running in heating mode for a predetermined time, the coil temperature of the outdoor condenser of the air conditioner is obtained to obtain the first target external pipe temperature, the speed of the outdoor fan of the air conditioner is obtained to obtain the target speed, the operating frequency of the compressor of the air conditioner is obtained to obtain the target frequency, and the coil temperature at the current moment is obtained to obtain the second target external pipe temperature. Then, the first target external pipe temperature, the target speed, and the target frequency are input into the defrosting calculation model to obtain the target defrosting external pipe temperature. Finally, if the second target external pipe temperature is less than the target defrosting external pipe temperature, it indicates that the air conditioner's frost has caused the heat exchanger's heat exchange power to decrease by more than a predetermined value, and at this time, the air conditioner is controlled to enter the defrosting mode. Compared to existing technologies where air conditioner defrosting is poor when outdoor ambient temperature is not detected, this application, without outdoor ambient temperature parameters, obtains three parameters—a first target external pipe temperature, a target rotation speed, and a target frequency—and inputs these three parameters into a defrosting calculation model that characterizes the relationship between these three parameters and the coil temperature at which the heat exchanger's heat exchange power decreases by a predetermined value due to air conditioner frost. This allows for a more accurate determination of the external pipe temperature at which the heat exchanger's heat exchange power decreases by a predetermined value under the corresponding operating conditions. Based on the calculated relationship between the external pipe temperature at which the heat exchanger's heat exchange power decreases by a predetermined value due to air conditioner frost and the real-time external pipe temperature of the air conditioner, the timing of the air conditioner entering defrosting can be controlled more accurately, thus ensuring a better defrosting effect.

[0110] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A control method of defrosting an air conditioner, characterized by, include: When the air conditioner is running in heating mode for a predetermined period of time, the coil temperature of the outdoor condenser of the air conditioner is obtained to obtain the first target outdoor coil temperature, the speed of the outdoor fan of the air conditioner is obtained to obtain the target speed, and the operating frequency of the compressor of the air conditioner is obtained to obtain the target frequency. Obtain the current coil temperature to obtain the second target external tube temperature, wherein the current time is later than the time when the predetermined running time is reached; The first target external pipe temperature, the target rotation speed, and the target frequency are input into the defrosting calculation model to obtain the target defrosting external pipe temperature. The target defrosting external pipe temperature is the coil temperature when the heat exchange power of the air conditioner's heat exchanger decreases by a predetermined value due to the outdoor condenser frosting. The defrosting calculation model is a model that characterizes the relationship between the defrosting external pipe temperature, the coil temperature, the outdoor fan speed, and the compressor operating frequency. When the second target external pipe temperature is lower than the target defrosting external pipe temperature, the air conditioner is controlled to enter defrosting mode; The first target external pipe temperature, the target rotational speed, and the target frequency are input into the defrosting calculation model to obtain the target defrosting external pipe temperature, including: inputting the first target external pipe temperature, the target rotational speed, and the target frequency into the calculation formula T. 化霜 =a×T t +b×F t –c×N t In –d, the target defrosting outer tube temperature is obtained, where T t For the first target external pipe temperature, F t For the target frequency, N t The target rotational speed is given by a, b, c, and d, which are coefficients. The value range of a is (0.8~1.2), the value range of b is (0.02~0.05), the value range of c is (0.001~0.003), and the value range of d is (5~7).

2. The control method according to claim 1, characterized by, The control method further includes: When the second target external pipe temperature is greater than or equal to the target defrosting external pipe temperature, the air conditioner is controlled to enter the non-defrosting mode.

3. The control method according to claim 2, characterized by, When the second target external pipe temperature is greater than or equal to the target defrosting external pipe temperature, the air conditioner is controlled to enter non-defrosting mode, including: If the second target external pipe temperature is greater than or equal to the target defrosting external pipe temperature, at least one of the following actions shall be performed based on the difference between the second target external pipe temperature and the target defrosting external pipe temperature: reducing the speed of the external fan, increasing the operating frequency of the compressor, and increasing the opening of the throttle valve.

4. The control method according to any one of claims 1 to 3, characterized in that, When the second target external pipe temperature is lower than the target defrosting external pipe temperature, the air conditioner is controlled to enter defrosting mode, including: When the second target external pipe temperature is lower than the target defrosting external pipe temperature, the degree of frost formation of the air conditioner is determined based on the difference between the target defrosting external pipe temperature and the second target external pipe temperature. The operation of the air conditioner is controlled according to the degree of frost formation.

5. The control method according to claim 4, characterized in that, Controlling the operation of the air conditioner based on the degree of frost includes: The defrosting parameters of the defrosting mode are determined based on the degree of frost formation. The defrosting parameters include the defrosting duration, the compressor operating frequency, and the throttle valve opening. Control the air conditioner to operate with the defrosting parameters.

6. An air conditioner defrosting control device characterized by comprising: include: The first acquisition unit is used to acquire the coil temperature of the outdoor condenser of the air conditioner to obtain a first target outdoor coil temperature, acquire the outdoor fan speed of the air conditioner to obtain a target speed, and acquire the compressor operating frequency of the air conditioner to obtain a target frequency when the air conditioner is running in heating mode for a predetermined time. The second acquisition unit is used to acquire the current coil temperature and obtain the second target external tube temperature, wherein the current time is later than the time when the predetermined running time is reached; The input unit is used to input the first target external pipe temperature, the target rotation speed, and the target frequency into the defrosting calculation model to obtain the target defrosting external pipe temperature. The target defrosting external pipe temperature is the coil temperature when the heat exchange power of the air conditioner's heat exchanger decreases by a predetermined value due to the outdoor condenser frosting. The defrosting calculation model is a model that characterizes the relationship between the defrosting external pipe temperature, the coil temperature, the outdoor fan speed, and the compressor operating frequency. The first control unit is used to control the air conditioner to enter the defrosting mode when the second target external pipe temperature is lower than the target defrosting external pipe temperature; The input unit includes: a first input module, used to input the first target external pipe temperature, the target rotation speed, and the target frequency into the calculation formula T. 化霜 =a×T t +b×F t –c×N t In –d, the target defrosting outer tube temperature is obtained, where T t For the first target external pipe temperature, F t For the target frequency, N t The target rotational speed is given by a, b, c, and d, which are coefficients. The value range of a is (0.8~1.2), the value range of b is (0.02~0.05), the value range of c is (0.001~0.003), and the value range of d is (5~7).

7. An electronic device, comprising: include: One or more processors, a memory, and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by the one or more processors, the one or more programs including methods for performing the control method of any one of claims 1 to 5.

8. An air conditioning system characterized by, include: An air conditioner, comprising a condenser, an outdoor fan, a compressor, and a heat exchanger; A controller for performing the control method according to any one of claims 1 to 5.

Images