Defrosting control method and device of air conditioner and air conditioner

Abstract

The invention relates to the technical field of air conditioners, and discloses a defrosting control method and device of an air conditioner and the air conditioner. The defrosting control method comprises the steps that the target frequency of a compressor and the target opening degree of an electronic expansion valve are determined based on the outdoor environment temperature and the indoor coil pipe temperature; according to the control method, the frequency of the compressor and the opening degree of the electronic expansion valve are dynamically optimized through real-time feedback of the environment temperature and the temperature of the coil pipe, defrosting logic of the air conditioner is optimized, high-voltage faults can be prevented from being reported when the outdoor environment temperature is too high, and the service life of the air conditioner is prolonged. The phenomenon that the temperature of an indoor coil pipe is frozen due to the fact that the temperature of the outdoor coil pipe is too low, the frequency of a compressor is too high or the opening degree of an electronic expansion valve is too small can be avoided, it can be guaranteed that defrosting is thorough when the outdoor temperature is too low and the humidity is large, and the problems that high-pressure protection is prone to being triggered and residual frost is left after defrosting in traditional defrosting can be solved from the mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to a defrosting control method and a control device for an air conditioner, and an air conditioner. Background Art

[0002] During heating operation, the outdoor heat exchanger remains at a low temperature for extended periods. If the outdoor air temperature is low and the humidity is high, water vapor in the air will condense into frost on the surface of the outdoor heat exchanger. Frost on the outdoor heat exchanger reduces heat transfer efficiency, impacting indoor comfort and reducing the air conditioner's energy efficiency. Therefore, when frosted, the air conditioner requires timely defrosting. This involves switching the air conditioner to defrost mode, switching the heating cycle to a cooling cycle, and raising the outdoor heat exchanger temperature to remove the frost.

[0003] However, when the air conditioner is defrosting, it will report a high-voltage fault because the outdoor ambient temperature is too high, the defrost frequency of the compressor is too high, or the opening of the electronic expansion valve is too low. It may also report an unreasonable defrost parameter because the outdoor temperature is too low and the outdoor air humidity is too high, resulting in residual frost during defrosting, affecting the user experience.

[0004] Therefore, how to reduce the risk of high-voltage fault when the air conditioner performs the defrost function and avoid the problem of residual frost is an issue that the industry urgently needs to solve. Summary of the Invention

[0005] The present invention provides a defrosting control method, a control device and an air conditioner for an air conditioner, which are used to solve the problems in the prior art that the air conditioner is prone to high voltage fault when performing the defrosting function and that residual frost still exists after defrosting.

[0006] A first aspect of the present invention provides a defrost control method for an air conditioner, comprising: Based on the outdoor ambient temperature and the indoor coil temperature, the target frequency of the compressor and the target opening of the electronic expansion valve are determined.

[0007] According to the defrost control method for an air conditioner provided by the present invention, determining the target frequency of the compressor and the target opening of the electronic expansion valve based on the outdoor ambient temperature and the indoor coil temperature includes: Determining a target ambient temperature segment and a target coil temperature segment based on the indoor ambient temperature and the indoor coil temperature, respectively; the target temperature segment is one of a plurality of ambient temperature segments, and the target coil temperature segment is one of a plurality of coil temperature segments; Determining the target frequency based on the target ambient temperature range, the target coil temperature range, and a preset frequency; The target opening is determined based on the target ambient temperature range, the target coil temperature range, and a preset opening.

[0008] According to the defrost control method for an air conditioner provided by the present invention, determining the target frequency based on the target ambient temperature range, the target coil temperature range, and the preset frequency includes: Determining a target frequency correction coefficient based on a combination of the target ambient temperature segment and the target coil temperature segment; the target frequency correction coefficient is one of a plurality of frequency correction coefficients; the number of combinations of the ambient temperature segments and the coil temperature segments is consistent with the number of the frequency correction coefficients, and the number of combinations is one-to-one corresponding to the frequency correction coefficients; The target frequency is determined based on a first relationship between the target frequency correction coefficient and the preset frequency.

[0009] According to the defrost control method for an air conditioner provided by the present invention, determining the target frequency based on the first relationship between the target frequency correction coefficient and the preset frequency includes: The target frequency is determined based on a product of the target frequency correction coefficient and the preset frequency.

[0010] According to the defrost control method for an air conditioner provided by the present invention, determining the target opening degree based on the target ambient temperature range, the target coil temperature range, and the preset opening degree includes: Determining a target opening correction coefficient based on a combination of the target ambient temperature segment and the target coil temperature segment; the target opening correction coefficient is one of a plurality of opening correction coefficients; the number of combinations of the ambient temperature segments and the coil temperature segments is consistent with the number of the opening correction coefficients, and the number of combinations is one-to-one corresponding to the number of the opening correction coefficients; The target opening is determined based on the target opening correction coefficient and a second relationship between the preset openings.

[0011] According to the defrost control method for an air conditioner provided by the present invention, determining the target opening based on the second relationship between the target opening correction coefficient and the preset opening includes: The target opening is determined based on a product of the target opening correction coefficient and the preset opening.

[0012] According to the defrost control method for an air conditioner provided by the present invention, before determining the target frequency of the compressor and the target opening of the electronic expansion valve based on the outdoor ambient temperature and the indoor coil temperature, the method further includes: The historical outdoor ambient temperature is divided into multiple ambient temperature segments; the historical indoor coil temperature is divided into multiple coil temperature segments.

[0013] According to the defrost control method for an air conditioner provided by the present invention, the target frequency of the compressor and the target opening of the electronic expansion valve are determined based on the outdoor ambient temperature and the indoor coil temperature, further comprising: The PID control algorithm is used to process the outdoor ambient temperature and the indoor coil temperature to determine the target frequency of the compressor and the target opening of the electronic expansion valve.

[0014] A second aspect of the present invention provides a defrost control device for an air conditioner, comprising: The determination module is used to determine the target frequency of the compressor and the target opening of the electronic expansion valve based on the outdoor ambient temperature and the indoor coil temperature.

[0015] A third aspect of the present invention provides an air conditioner comprising the above-mentioned defrost control device.

[0016] The defrost control method for the air conditioner provided by the present invention dynamically optimizes the compressor frequency and the opening of the electronic expansion valve through real-time feedback of the ambient temperature and the coil temperature, thereby optimizing the defrost logic of the air conditioner. It can avoid high-voltage faults when the outdoor ambient temperature is too high, and can avoid freezing of the indoor coil temperature due to the outdoor coil temperature being too low, the compressor frequency being too high, or the electronic expansion valve opening being too small. It can ensure clean defrosting when the outdoor temperature is too low and the humidity is high, and can solve the problems of easy triggering of high-voltage protection and residual frost after defrosting in traditional defrosting from a mechanism perspective.

[0017] The air conditioner and the defrost control device provided by the present invention can execute the above-mentioned defrost control method, and therefore have at least the above-mentioned advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is one of the flow charts of the defrost control method for an air conditioner provided by the present invention.

[0020] Figure 2 This is the second flow chart of the defrost control method for an air conditioner provided by the present invention.

[0021] Figure 3 This is the third flow chart of the defrost control method for an air conditioner provided by the present invention.

[0022] Figure 4 It is a structural schematic diagram of the defrost control device for an air conditioner provided by the present invention.

[0023] Figure 5 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0025] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on the specific circumstances.

[0026] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0027] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0028] In the embodiments of the present invention, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the association relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone.

[0029] The following combination Figures 1 to 4 The defrosting control method, control device and air conditioner of the present invention are described in detail.

[0030] It should be noted that the defrost control method for an air conditioner of the present invention is performed by a controller or a control device.

[0031] A specific embodiment of the first aspect of the present invention provides a defrost control method for an air conditioner. The defrost control method includes: determining a target frequency of a compressor and a target opening of an electronic expansion valve based on an outdoor ambient temperature and an indoor coil temperature.

[0032] In this embodiment, the defrost logic of the air conditioner is optimized by dynamically optimizing the compressor frequency and the opening of the electronic expansion valve through real-time feedback of the ambient temperature and the coil temperature. This can avoid high-voltage faults when the outdoor ambient temperature is too high, and can avoid freezing of the indoor coil temperature due to the outdoor coil temperature being too low, the compressor frequency being too high, or the electronic expansion valve opening being too small. This can ensure clean defrosting when the outdoor temperature is too low and the humidity is high, and can solve the problems of easy triggering of high-voltage protection and residual frost after defrosting in traditional defrosting from a mechanistic perspective.

[0033] Optionally, a first temperature sensor may be used to detect the outdoor ambient temperature, and a second temperature sensor may be used to detect the indoor coil temperature. A controller is electrically connected to the first and second temperature sensors to obtain the outdoor ambient temperature and the indoor coil temperature. The controller determines a target frequency for the compressor and a target opening for the electronic expansion valve based on the outdoor ambient temperature and the indoor coil temperature. The controller then controls the compressor to operate at the target frequency and controls the electronic expansion valve to adjust its opening to the target opening.

[0034] In some embodiments of the present invention, determining a target frequency of the compressor and a target opening of the electronic expansion valve based on the outdoor ambient temperature and the indoor coil temperature further includes: A PID control algorithm processes the outdoor ambient temperature and indoor coil temperature to determine the target compressor frequency and electronic expansion valve opening. The PID algorithm dynamically adjusts control parameters to adapt to defrost requirements under varying ambient temperatures and humidities, avoiding control failures caused by fixed parameters. It filters sensor noise or transient abnormal data, preventing false operation and enhancing adaptability to complex operating conditions, thus improving robustness. By precisely matching compressor frequency and valve opening, the PID algorithm avoids the increased energy consumption associated with traditional methods, such as overshoot or undershoot. At the end of defrost, the PID algorithm slowly returns the compressor frequency and valve opening to heating mode, avoiding sudden pressure changes and thermal shock, thereby extending equipment life. The PID algorithm also dynamically adjusts the electronic expansion valve opening to ensure dynamic pressure balance between the high-pressure side (condenser) and the low-pressure side (evaporator), fundamentally preventing high-pressure faults. In summary, the introduction of the PID control algorithm upgrades the defrost process from "open-loop, extensive" to "closed-loop, precise" control. Through dynamic response, adaptive adjustment, and energy optimization, it simultaneously addresses high-pressure faults and residual frost, while improving system reliability and energy efficiency.

[0035] like Figure 1 As shown, in some other embodiments of the present invention, determining the target frequency of the compressor and the target opening of the electronic expansion valve based on the outdoor ambient temperature and the indoor coil temperature includes: S100: Determine a target ambient temperature segment and a target coil temperature segment based on the indoor ambient temperature and the indoor coil temperature, respectively; the target temperature segment is one of a plurality of ambient temperature segments, and the target coil temperature segment is one of a plurality of coil temperature segments.

[0036] Optionally, before determining the target frequency of the compressor and the target opening of the electronic expansion valve based on the outdoor ambient temperature and the indoor coil temperature, the method further includes dividing the historical outdoor ambient temperature into multiple ambient temperature segments and dividing the historical indoor coil temperature into multiple coil temperature segments. This can make the temperature segment division more consistent with actual conditions.

[0037] S200 , determining a target frequency based on a target ambient temperature segment, a target coil temperature segment, and a preset frequency; determining a target opening based on a target ambient temperature segment, a target coil temperature segment, and a preset opening.

[0038] In this embodiment, this segmented temperature control strategy avoids the complexity and potential errors of real-time dynamic calculations, reducing processor power requirements compared to traditional continuous regulation or single-threshold control. Continuous control (e.g., PID) can lead to frequent adjustments (e.g., compressor startup and shutdown, valve vibration) due to minor fluctuations near critical temperatures. However, segmented control divides the temperature range into stable intervals, adjusting parameters only when crossing intervals, significantly reducing the number of actuator actions. The frequency and opening value for each temperature interval can be calibrated through extensive experimentation, allowing for flexible adjustment of preset frequencies to suit different climate conditions (e.g., severe cold in the north and high humidity in the south) or unit characteristics without modifying the control algorithm. The combined segmentation of ambient and coil temperatures more accurately reflects the coupled relationships between frost thickness, refrigerant flow, and heat load. In summary, the defrost control method of this embodiment significantly reduces system complexity and cost while ensuring effective control. It is particularly suitable for air conditioner defrosting scenarios where real-time performance is not a priority but long-term stable operation is required. Its core advantages lie in its ease of engineering implementation, strong anti-interference capabilities, and empirically optimized parameters, making it a practical solution for resolving high-voltage faults and residual frost.

[0039] like Figure 2 As shown, in some embodiments of the present invention, determining the target frequency based on the target ambient temperature range, the target coil temperature range, and the preset frequency includes: S201. Determine a target frequency correction coefficient based on a combination of a target ambient temperature segment and a target coil temperature segment; the target frequency correction coefficient is one of a plurality of frequency correction coefficients; the number of combinations of ambient temperature segments and coil temperature segments is consistent with the number of frequency correction coefficients, and the number of combinations is one-to-one corresponding to the number of frequency correction coefficients; S202: Determine a target frequency based on a first relationship between a target frequency correction coefficient and a preset frequency.

[0040] In this embodiment, the frequency correction coefficient is determined by combining ambient and coil temperature segments. This more accurately reflects the complex relationship between frosting rate, heat load, and refrigerant flow, avoiding the one-sidedness of single-temperature parameter control and dynamically adapting to actual needs. A preset frequency serves as a baseline value, and the correction coefficient is scaled based on actual operating conditions, maintaining universality while enabling flexible adjustment. The number of ambient and coil temperature segment combinations corresponds one-to-one with the frequency correction coefficient, forming a two-dimensional control matrix. The hardware only needs to perform a simple table lookup and combine the first relationship to determine the target frequency, reducing computing power and control costs. Compared to PID control algorithms, this embodiment eliminates the need for online calculus calculations, reducing code complexity and memory usage. The frequency correction coefficient for each temperature segment combination can be independently optimized through experimentation, and local parameter adjustments do not affect the global control logic, facilitating maintenance. Air conditioners in the same series can share a preset frequency baseline and adapt to different power models solely through the frequency correction coefficient. The frequency correction coefficient takes discrete values ​​per temperature segment, rather than continuously varying, to avoid frequent frequency jumps caused by small temperature fluctuations.

[0041] Optionally, determining the target frequency based on a first relationship between the target frequency correction coefficient and the preset frequency includes: determining the target frequency based on a product of the target frequency correction coefficient and the preset frequency. Specifically, the first relationship is Formula (1).

[0042] Formula (1).

[0043] In formula (1), is the target frequency, is the preset frequency, is the target frequency correction factor.

[0044] In this embodiment, the target frequency correction coefficient is multiplied by the preset frequency to determine the final target frequency, so that all controls are based on a unified preset frequency reference, which can ensure the consistency of the basic characteristics of the system and save computing resources.

[0045] Optionally, the frequency correction coefficient h satisfies: 0<h<1.5. Preferably, 0.6<h<1.3.

[0046] like Figure 3 As shown, in some embodiments of the present invention, based on the target ambient temperature range, the target coil temperature range and the preset opening, determining the target opening includes: S203. Determine a target opening correction coefficient based on a combination of a target ambient temperature segment and a target coil temperature segment; the target opening correction coefficient is one of a plurality of opening correction coefficients; the number of combinations of ambient temperature segments and coil temperature segments is consistent with the number of opening correction coefficients, and they correspond one to one; S204: Determine the target opening based on the target opening correction coefficient and the second relationship between the preset openings.

[0047] In this embodiment, the frequency correction coefficient is determined by combining ambient and coil temperature segments. This more accurately reflects the complex relationship between frosting rate, heat load, and refrigerant flow, avoiding the one-sidedness of single-temperature parameter control and dynamically adapting to actual needs. A preset opening serves as a baseline value, and the opening correction coefficient is scaled based on this baseline according to actual operating conditions, maintaining universality while enabling flexible adjustment. The number of ambient and coil temperature segment combinations corresponds one-to-one to the opening correction coefficient, forming a two-dimensional control matrix. The hardware only needs to perform a simple table lookup and combine it with the secondary relationship to determine the target opening, reducing computing power and control costs. Compared to PID control algorithms, this embodiment eliminates the need for online calculus calculations, reducing code complexity and memory usage. The opening correction coefficient for each temperature segment combination can be independently optimized through experimentation, allowing local parameter adjustments to maintain the overall control logic without affecting the overall control logic, facilitating maintenance. Air conditioners within the same series can share a preset frequency baseline and adapt to different power models solely through the opening correction coefficient. The opening correction coefficient takes discrete values ​​per temperature segment, rather than continuously varying, to avoid frequent frequency jumps caused by small temperature fluctuations.

[0048] Optionally, determining the target opening based on a second relationship between the target opening correction coefficient and the preset opening includes determining the target opening based on a product of the target opening correction coefficient and the preset opening. Specifically, the second relationship is Formula (2).

[0049] Formula (2).

[0050] In formula (2), is the target opening, For the preset opening, is the target opening correction coefficient.

[0051] In this embodiment, the target opening correction coefficient is multiplied by the preset opening to determine the final target opening, so that all controls are based on a unified preset opening benchmark, which can ensure the consistency of the basic characteristics of the system and save computing resources.

[0052] Optionally, the opening correction coefficient k satisfies: 0<k<2. Preferably, 0.7<k<1.6.

[0053] It should be noted that the number of ambient temperature segments can be the same as or different from the number of coil temperature segments. In a specific embodiment of the present invention, the number of ambient temperature segments and the number of coil temperature segments can be set according to actual conditions, and the range of each temperature segment can also be set according to actual conditions.

[0054] In one embodiment of the present invention, a defrost control method for an air conditioner includes: First, divide the outdoor ambient temperature into six segments and the indoor coil temperature into four segments. The six segments are: segment 1, segment 2, segment 3, segment 4, segment 5, and segment 6. The temperatures in these six segments gradually increase. The four coil temperature segments are: segment 1, segment 2, segment 3, and segment 4. The temperatures in these four segments gradually increase. The combinations of ambient and coil temperature segments correspond to the frequency correction coefficients, as shown in Table 1. The combinations of ambient and coil temperature segments correspond to the opening correction coefficients, as shown in Table 2.

[0055] Table 1 Corresponding relationship between the combination of ambient temperature range and coil temperature range and frequency correction coefficient

[0056] Table 2 Corresponding relationship between the combination of ambient temperature section and coil temperature section and the opening correction coefficient

[0057] Table 1 Represents the frequency correction coefficient corresponding to the combination of the mth coil temperature segment and the nth ambient temperature segment; m can be 1, 2, 3 and 4; n can be 1, 2, 3, 4, 5 and 6.

[0058] Table 2 Represents the opening correction coefficient corresponding to the combination of the mth coil temperature section and the nth ambient temperature section; m is 1, 2, 3 and 4; n is 1, 2, 3, 4, 5 and 6.

[0059] Secondly, the controller determines the target ambient temperature segment and the target coil temperature segment based on the current indoor ambient temperature and the indoor coil temperature; then, the target frequency correction coefficient and the target opening correction coefficient can be determined through Table 1 and Table 2.

[0060] Again, the controller determines the target frequency based on the stored formula (1), i.e., the product of the target frequency correction coefficient and the preset frequency. The controller also determines the target opening based on the stored formula (2), i.e., the product of the target opening correction coefficient and the preset opening. It can be understood that the target frequency correction coefficient is one of all the frequency correction coefficients in Table 1; the target opening correction coefficient is one of all the opening correction coefficients in Table 2; and the preset frequency and preset opening are both stored in the controller in advance.

[0061] Finally, the controller sends a frequency adjustment control instruction carrying the target frequency to the compressor, and the compressor adjusts the frequency to the target frequency based on the control instruction; the controller sends an opening adjustment control instruction carrying the target opening to the electronic expansion valve, and the electronic expansion valve adjusts the opening to the target opening based on the control instruction.

[0062] For example, the combination of the ambient temperature segment and the coil temperature segment corresponds to the frequency correction coefficient in one-to-one correspondence, as shown in Table 3; the combination of the ambient temperature segment and the coil temperature segment corresponds to the opening correction coefficient in one-to-one correspondence, as shown in Table 4.

[0063] Table 3 Corresponding relationship between the combination of ambient temperature range and coil temperature range and frequency correction coefficient

[0064] Table 4 Corresponding relationship between the combination of ambient temperature section and coil temperature section and the opening correction coefficient

[0065] In Tables 1 and 2, TM is the indoor coil temperature; TA is the indoor ambient temperature.

[0066] The defrost control device for an air conditioner provided by the present invention is described below. The defrost control device for an air conditioner described below and the defrost control method for an air conditioner described above can be referred to each other.

[0067] like Figure 4 As shown, the second aspect of the present invention provides a defrost control device for an air conditioner. The defrost control device for an air conditioner includes a determination module configured to determine a target frequency of a compressor and a target opening of an electronic expansion valve based on an outdoor ambient temperature and an indoor coil temperature.

[0068] In some embodiments, the determination module includes a first determination unit, a second determination unit, and a third determination unit. The first determination unit is configured to determine a target ambient temperature segment and a target coil temperature segment based on the indoor ambient temperature and the indoor coil temperature, respectively. The target temperature segment is one of multiple ambient temperature segments, and the target coil temperature segment is one of multiple coil temperature segments. The second determination unit is configured to determine a target frequency based on the target ambient temperature segment, the target coil temperature segment, and a preset frequency. The third determination unit is configured to determine a target opening degree based on the target ambient temperature segment, the target coil temperature segment, and a preset opening degree.

[0069] In some embodiments, the defrost control device of the air conditioner also includes a storage module; the storage module is used to divide the historical outdoor ambient temperature into multiple ambient temperature segments and store them; the storage module is also used to divide the historical indoor coil temperature into multiple coil temperature segments and store them.

[0070] Optionally, the storage module stores a correspondence table of combinations of ambient temperature segments and coil temperature segments and frequency correction coefficients, and also stores a correspondence table of combinations of ambient temperature segments and coil temperature segments and opening correction coefficients.

[0071] Optionally, first, the second determination unit is configured to determine a target frequency correction coefficient based on a combination of a target ambient temperature segment and a target coil temperature segment; the target frequency correction coefficient is one of a plurality of frequency correction coefficients; the number of combinations of ambient temperature segments and coil temperature segments is consistent with the number of frequency correction coefficients, and the number of combinations is one-to-one. Then, the second determination unit is configured to determine the target frequency based on the product of the target frequency correction coefficient and the preset frequency.

[0072] Optionally, first, the third determination unit is configured to determine a target opening correction coefficient based on a combination of a target ambient temperature segment and a target coil temperature segment; the target opening correction coefficient is one of a plurality of opening correction coefficients; the number of combinations of ambient temperature segments and coil temperature segments is consistent with the number of opening correction coefficients, and the number of combinations is one-to-one. Then, the third determination unit is configured to determine the target opening based on the product of the target opening correction coefficient and the preset opening.

[0073] A third aspect of the present invention provides an air conditioner, which includes the defrost control device according to any of the above embodiments.

[0074] Figure 5 An example of a physical structure diagram of an electronic device is shown below. Figure 5 As shown, the electronic device may include: a processor 810, a communications interface 820, a memory 830, and a communications bus 840. The processor 810, the communications interface 820, and the memory 830 communicate with each other via the communications bus 840. The processor 810 may call logic instructions in the memory 830 to execute a defrost control method for an air conditioner. The method includes: S100, determining a target ambient temperature segment and a target coil temperature segment based on the indoor ambient temperature and the indoor coil temperature, respectively; the target temperature segment is one of multiple ambient temperature segments, and the target coil temperature segment is one of multiple coil temperature segments; S200, determining a target frequency based on the target ambient temperature segment, the target coil temperature segment, and a preset frequency; and determining a target opening degree based on the target ambient temperature segment, the target coil temperature segment, and a preset opening degree.

[0075] Furthermore, the logic instructions in the aforementioned memory 830 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the portion that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product, stored in a storage medium, includes instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, mobile hard drives, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical disks.

[0076] On the other hand, the present invention also provides a computer program product, which includes a computer program, which can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the defrost control method of the air conditioner provided by the above methods, the method including: S100, based on the indoor ambient temperature and the indoor coil temperature, respectively determining the target ambient temperature segment and the target coil temperature segment; the target temperature segment is one of multiple ambient temperature segments, and the target coil temperature segment is one of multiple coil temperature segments; S200, based on the target ambient temperature segment, the target coil temperature segment and the preset frequency, determining the target frequency; based on the target ambient temperature segment, the target coil temperature segment and the preset opening, determining the target opening.

[0077] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the defrost control method for the air conditioner provided by the above-mentioned methods, the method comprising: S100, determining a target ambient temperature segment and a target coil temperature segment based on the indoor ambient temperature and the indoor coil temperature, respectively; the target temperature segment is one of a plurality of ambient temperature segments, and the target coil temperature segment is one of a plurality of coil temperature segments; S200, determining a target frequency based on the target ambient temperature segment, the target coil temperature segment and a preset frequency; determining a target opening based on the target ambient temperature segment, the target coil temperature segment and a preset opening.

[0078] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0079] Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented using software plus a necessary general-purpose hardware platform, or of course, hardware. Based on this understanding, the essence of the above technical solution, or the portion that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, or an optical disk, and includes a number of instructions for causing a computer device (such as a personal computer, server, or network device) to execute the methods described in each embodiment or certain portions of the embodiments.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A defrost control method for an air conditioner, characterized in that: include: Based on the outdoor ambient temperature and the indoor coil temperature, the target frequency of the compressor and the target opening of the electronic expansion valve are determined.

2. The defrost control method for an air conditioner according to claim 1, wherein: The step of determining the target frequency of the compressor and the target opening of the electronic expansion valve based on the outdoor ambient temperature and the indoor coil temperature includes: Determining a target ambient temperature segment and a target coil temperature segment based on the indoor ambient temperature and the indoor coil temperature, respectively; the target temperature segment is one of a plurality of ambient temperature segments, and the target coil temperature segment is one of a plurality of coil temperature segments; Determining the target frequency based on the target ambient temperature range, the target coil temperature range, and a preset frequency; The target opening is determined based on the target ambient temperature range, the target coil temperature range, and a preset opening.

3. The defrost control method for an air conditioner according to claim 2, wherein: The determining the target frequency based on the target ambient temperature range, the target coil temperature range, and the preset frequency includes: Determining a target frequency correction coefficient based on a combination of the target ambient temperature segment and the target coil temperature segment; the target frequency correction coefficient is one of a plurality of frequency correction coefficients; the number of combinations of the ambient temperature segments and the coil temperature segments is consistent with the number of the frequency correction coefficients, and the number of combinations is one-to-one corresponding to the frequency correction coefficients; The target frequency is determined based on a first relationship between the target frequency correction coefficient and the preset frequency.

4. The defrost control method for an air conditioner according to claim 3, wherein: The determining the target frequency based on the first relationship between the target frequency correction coefficient and the preset frequency includes: The target frequency is determined based on a product of the target frequency correction coefficient and the preset frequency.

5. The defrost control method for an air conditioner according to claim 2, wherein: The determining the target opening degree based on the target ambient temperature range, the target coil temperature range, and the preset opening degree includes: Determining a target opening correction coefficient based on a combination of the target ambient temperature segment and the target coil temperature segment; the target opening correction coefficient is one of a plurality of opening correction coefficients; the number of combinations of the ambient temperature segments and the coil temperature segments is consistent with the number of the opening correction coefficients, and the number of combinations is one-to-one corresponding to the number of the opening correction coefficients; The target opening is determined based on the target opening correction coefficient and a second relationship between the preset openings.

6. The defrost control method for an air conditioner according to claim 5, characterized in that: The determining of the target opening based on the second relationship between the target opening correction coefficient and the preset opening includes: The target opening is determined based on a product of the target opening correction coefficient and the preset opening.

7. The defrost control method for an air conditioner according to any one of claims 1 to 6, characterized in that: Before determining the target frequency of the compressor and the target opening of the electronic expansion valve based on the outdoor ambient temperature and the indoor coil temperature, the following steps are also included: The historical outdoor ambient temperature is divided into multiple ambient temperature segments; the historical indoor coil temperature is divided into multiple coil temperature segments.

8. The defrost control method for an air conditioner according to claim 1, wherein: The step of determining the target frequency of the compressor and the target opening of the electronic expansion valve based on the outdoor ambient temperature and the indoor coil temperature further includes: The PID control algorithm is used to process the outdoor ambient temperature and the indoor coil temperature to determine the target frequency of the compressor and the target opening of the electronic expansion valve.

9. A defrost control device for an air conditioner, characterized in that: include: The determination module is used to determine the target frequency of the compressor and the target opening of the electronic expansion valve based on the outdoor ambient temperature and the indoor coil temperature.

10. An air conditioner, characterized in that: The defrost control device comprises the defrost control device according to claim 9.

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