Air conditioner defrosting control method and device, air conditioner, and computer program product

Abstract

The present invention discloses a defrosting control method and device for an air conditioner, an air conditioner, and a computer program product. The method includes: determining the retest power of the motor according to the power difference between the actual motor power of the air conditioner motor at the current speed and the predetermined power; obtaining the real-time motor power of the air conditioner when it is determined that the outer tube temperature of the air conditioner is lower than the dew point temperature and the outdoor ambient temperature of the air conditioner is lower than the predetermined temperature, wherein the outer tube temperature is the temperature of the outer tube of the evaporator in the air conditioner; determining the formation stage of the frost layer on the heat exchanger of the air conditioner according to the retest power and the real-time motor power; determining the defrosting strategy for the air conditioner according to the formation stage; and controlling the air conditioner to perform the defrosting operation according to the defrosting strategy. The present invention solves the technical problem that the traditional defrosting method for air conditioners in the related art does not estimate the frost layer condition in advance, resulting in poor defrosting effect.

Description

Technical Field

[0001] The present invention relates to the field of household appliance control technology, and in particular to a defrosting control method and device for an air conditioner, an air conditioner, and a computer program product. Background Art

[0002] Cold storage is an important part of cold chain logistics, accounting for the vast majority of energy consumption. For refrigeration equipment, high defrosting energy consumption is one of the current problems.

[0003] At present, the defrost control models used by various manufacturers are mainly based on laboratory experimental data, based on the frost conditions under normal temperature and humidity conditions, and defrost control is performed at different times. The disadvantage is that different regions, different temperatures and humidity are different from laboratory conditions, resulting in longer or shorter defrost times, and defrost control cannot be accurately performed according to the frost layer conditions, which greatly increases power consumption and significantly reduces the room heating effect.

[0004] At present, the frontier theory mainly uses environmental conditions to make algorithmic predictions for frost and uses logic to judge the frost situation. Similarly, this method also has certain deviations through prediction, and there will be situations that are inconsistent with expectations.

[0005] With regard to the problem that the conventional air conditioner defrosting method in the above-mentioned related art does not predict the frost layer condition, resulting in poor defrosting effect, no effective solution has been proposed yet. Summary of the invention

[0006] The embodiments of the present invention provide a defrost control method and device for an air conditioner, an air conditioner, and a computer program product, so as to at least solve the technical problem in the related art that the traditional defrost method for an air conditioner does not predict the frost layer condition, resulting in poor defrost effect.

[0007] According to one aspect of an embodiment of the present invention, a defrost control method for an air conditioner is provided, comprising: determining a retest power of the motor of the air conditioner according to a power difference between an actual motor power of the motor at a current speed and a predetermined power, wherein the predetermined power is a theoretical motor power at the current speed pre-stored by a controller of the air conditioner; when it is determined that an outer tube temperature of the air conditioner is lower than a dew point temperature and an outdoor ambient temperature of the air conditioner is lower than a predetermined temperature, obtaining a real-time motor power of the air conditioner, wherein the outer tube temperature is a temperature of an outer tube of an evaporator in the air conditioner; determining a formation stage of a frost layer on a heat exchanger of the air conditioner according to the retest power and the real-time motor power; determining a defrost strategy for the air conditioner according to the formation stage; and controlling the air conditioner to perform a defrost operation according to the defrost strategy.

[0008] Optionally, the re-test power of the motor is determined based on the power difference between the actual motor power of the air conditioner at the current speed and the predetermined power, including: obtaining the current speed of the motor; obtaining the actual motor power of the motor at the current speed; when the power difference between the actual motor power and the predetermined power is less than a power test value, determining the predetermined power as the re-test power, wherein the power test value is used to determine whether the motor has passed the re-test; when the power difference is not less than the power test value, determining the actual motor power as the re-test power.

[0009] Optionally, determining the formation stage of the frost layer according to the re-test power and the real-time motor power includes: determining a start time for acquiring the real-time motor power, and determining a predetermined period after the start time as a frost core formation stage; and determining a power ratio of the re-test power to the real-time motor power by using a first formula, wherein the first formula is: , N represents the power ratio, A represents the re-test power, and P represents the real-time motor power; the formation stage of the frost layer is determined according to the comparison result between the power ratio and the power threshold.

[0010] Optionally, the power threshold includes: a first power threshold, a second power threshold, a third power threshold, a fourth power threshold and a fifth power threshold, and the values ​​of the first power threshold, the second power threshold, the third power threshold, the fourth power threshold and the fifth power threshold increase successively when the power of the fan in the air conditioner increases with the air volume, and decrease successively when the power decreases with the air volume.

[0011] Optionally, when the values ​​of the first power threshold, the second power threshold, the third power threshold, the fourth power threshold and the fifth power threshold increase successively, the formation stage of the frost layer is determined according to the comparison result of the power ratio and the power threshold, including: when it is determined that the power ratio is not less than the first power threshold and less than the second power threshold, the formation stage is determined to be the initial stage of frost layer growth; when it is determined that the power ratio is not less than the second power threshold and less than the third power threshold, the formation stage is determined to be the termination stage of frost layer growth; when it is determined that the power ratio is not less than the third power threshold and less than the fourth power threshold, the formation stage is determined to be the first frost layer formation stage; when it is determined that the power ratio is not less than the fourth power threshold and less than the fifth power threshold, the formation stage is determined to be the second frost layer formation stage; when it is determined that the power ratio is not less than the fifth power threshold, the formation stage is determined to be the stage requiring forced defrosting.

[0012] Optionally, when the values ​​of the first power threshold, the second power threshold, the third power threshold, the fourth power threshold and the fifth power threshold decrease in sequence, the formation stage of the frost layer is determined according to the comparison result of the power ratio and the power threshold, including: when it is determined that the power ratio is not less than the first power threshold, the formation stage is determined to be the initial stage of frost layer growth; when it is determined that the power ratio is not less than the second power threshold and is less than the first power threshold, the formation stage is determined to be the termination stage of frost layer growth; when it is determined that the power ratio is not less than the third power threshold and is less than the second power threshold, the formation stage is determined to be the first stage of frost layer formation; when it is determined that the power ratio is not less than the fourth power threshold and is less than the third power threshold, the formation stage is determined to be the second stage of frost layer formation; when it is determined that the power ratio is not less than the fifth power threshold and is less than the fourth power threshold, the formation stage is determined to be the stage requiring forced defrosting.

[0013] Optionally, the defrost strategy for the air conditioner is determined according to the formation stage, including: when the formation stage is the frost core formation stage or the initial stage of frost layer growth, the defrost strategy is determined to be: not performing the defrost operation; when the formation stage is any one of the following: the frost layer growth termination stage, the first stage of frost layer formation, and the second stage of frost layer formation, the defrost strategy is determined to be: when the ambient humidity of the current environment of the air conditioner meets the defrost conditions, the air conditioner is controlled to perform the defrost operation; when the formation stage is the forced defrost stage, the defrost strategy is determined to be: controlling the air conditioner to perform the defrost operation.

[0014] Optionally, the defrost control method of the air conditioner also includes: obtaining the ambient humidity of the current environment of the air conditioner; when the formation stage is the termination stage of the frost layer growth, determining the defrost condition as: the ambient humidity is not less than a first humidity threshold; when the formation stage is the first stage of frost layer formation, determining the defrost condition as: the ambient humidity is not less than a second humidity threshold and is less than the first humidity threshold; when the formation stage is the second stage of frost layer formation, determining the defrost condition as: the ambient humidity is not less than a third humidity threshold and is less than the second humidity threshold, wherein the first humidity threshold is greater than the second humidity threshold, and the second humidity threshold is greater than the first humidity threshold.

[0015] Optionally, the defrost control method of the air conditioner also includes: obtaining a current operating mode of the air conditioner; when determining that the current operating mode is a power saving mode, controlling the air conditioner to perform the defrost operation in the second stage of frost layer formation; when determining that the current operating mode is a heat preservation mode, controlling the air conditioner to perform the defrost operation in the first stage of frost layer formation.

[0016] Optionally, the defrost control method for the air conditioner further comprises: when it is determined that the real-time motor power is the same as the re-checked power, determining that the defrost operation is finished.

[0017] According to another aspect of an embodiment of the present invention, a defrost control device for an air conditioner is provided, comprising: a first determination unit, for determining a retest power of the motor of the air conditioner according to a power difference between an actual motor power of the motor at a current speed of the air conditioner and a predetermined power, wherein the predetermined power is a theoretical motor power at the current speed pre-stored by a controller of the air conditioner; an acquisition unit, for acquiring a real-time motor power of the air conditioner when it is determined that the outer tube temperature of the air conditioner is lower than the dew point temperature and the outdoor ambient temperature of the air conditioner is lower than a predetermined temperature, wherein the outer tube temperature is the temperature of the outer tube of the evaporator in the air conditioner; a second determination unit, for determining a formation stage of a frost layer on the heat exchanger of the air conditioner according to the retest power and the real-time motor power; a third determination unit, for determining a defrost strategy for the air conditioner according to the formation stage; and a control unit, for controlling the air conditioner to perform a defrost operation according to the defrost strategy.

[0018] Optionally, the first determination unit includes: a first acquisition module, used to acquire the current speed of the motor; a second acquisition module, used to acquire the actual motor power of the motor at the current speed; a first determination module, used to determine that the predetermined power is the re-test power when the power difference between the actual motor power and the predetermined power is less than a power test value, wherein the power test value is used to determine whether the motor has passed the re-test; and a second determination module, used to determine that the actual motor power is the re-test power when the power difference is not less than the power test value.

[0019] Optionally, the second determination unit includes: a third determination module, used to determine the start time of obtaining the real-time motor power, and determine a predetermined period after the start time as the frost core formation stage; a fourth determination module, used to determine the power ratio of the re-check power to the real-time motor power by using a first formula, wherein the first formula is: , N represents the power ratio, A represents the re-test power, and P represents the real-time motor power; a fifth determination module is used to determine the formation stage of the frost layer according to the comparison result of the power ratio and the power threshold.

[0020] Optionally, the power threshold includes: a first power threshold, a second power threshold, a third power threshold, a fourth power threshold and a fifth power threshold, and the defrost control device of the air conditioner also includes: a value taking unit, for taking values ​​of the first power threshold, the second power threshold, the third power threshold, the fourth power threshold and the fifth power threshold so that the power of the fan in the air conditioner increases successively as the air volume increases, and decreases successively as the power decreases as the air volume decreases.

[0021] Optionally, when the values ​​of the first power threshold, the second power threshold, the third power threshold, the fourth power threshold and the fifth power threshold increase in sequence, the second determination unit includes: a sixth determination module, used to determine that the formation stage is the initial stage of frost layer growth when it is determined that the power ratio is not less than the first power threshold and less than the second power threshold; a seventh determination module, used to determine that the formation stage is the termination stage of frost layer growth when it is determined that the power ratio is not less than the second power threshold and less than the third power threshold; an eighth determination module, used to determine that the formation stage is the first frost layer formation stage when it is determined that the power ratio is not less than the third power threshold and less than the fourth power threshold; a ninth determination module, used to determine that the formation stage is the second frost layer formation stage when it is determined that the power ratio is not less than the fourth power threshold and less than the fifth power threshold; and a tenth determination module, used to determine that the formation stage is a stage requiring forced defrosting when it is determined that the power ratio is not less than the fifth power threshold.

[0022] Optionally, when the values ​​of the first power threshold, the second power threshold, the third power threshold, the fourth power threshold and the fifth power threshold decrease in sequence, the second determination unit includes: an eleventh determination module, used to determine that the formation stage is the initial stage of frost layer growth when it is determined that the power ratio is not less than the first power threshold; a twelfth determination module, used to determine that the formation stage is the termination stage of frost layer growth when it is determined that the power ratio is not less than the second power threshold and is less than the first power threshold; a thirteenth determination module, used to determine that the formation stage is the first stage of frost layer formation when it is determined that the power ratio is not less than the third power threshold and is less than the second power threshold; a fourteenth determination module, used to determine that the formation stage is the second stage of frost layer formation when it is determined that the power ratio is not less than the fourth power threshold and is less than the third power threshold; a fifteenth determination module, used to determine that the formation stage is a stage requiring forced defrosting when it is determined that the power ratio is not less than the fifth power threshold and is less than the fourth power threshold.

[0023] Optionally, the third determination unit includes: a sixteenth determination module, which is used to determine that the defrost strategy is: not performing the defrost operation when the formation stage is the frost core formation stage or the initial stage of frost layer growth; a seventeenth determination module, which is used to determine that the defrost strategy is: controlling the air conditioner to perform the defrost operation when the ambient humidity of the current environment of the air conditioner meets the defrost conditions when the formation stage is the forced defrost stage.

[0024] Optionally, the defrost control device of the air conditioner also includes: a third acquisition module, used to acquire the ambient humidity of the current environment of the air conditioner; a nineteenth determination module, used to determine that the defrost condition is: the ambient humidity is not less than a first humidity threshold when the formation stage is the termination stage of frost layer growth; a twentieth determination module, used to determine that the defrost condition is: the ambient humidity is not less than a second humidity threshold and less than the first humidity threshold when the formation stage is the first stage of frost layer formation; a twenty-first determination module, used to determine that the defrost condition is: the ambient humidity is not less than a third humidity threshold and less than the second humidity threshold when the formation stage is the second stage of frost layer formation, wherein the first humidity threshold is greater than the second humidity threshold, and the second humidity threshold is greater than the first humidity threshold.

[0025] Optionally, the defrost control device of the air conditioner also includes: a fourth acquisition module, used to acquire the current operating mode of the air conditioner; a first control module, used to control the air conditioner to perform the defrost operation in the second stage of frost layer formation when it is determined that the current operating mode is the power saving mode; and a second control module, used to control the air conditioner to perform the defrost operation in the first stage of frost layer formation when it is determined that the current operating mode is the heat preservation mode.

[0026] Optionally, the defrost control device of the air conditioner further comprises: a fourth determination unit, configured to determine that the defrost operation is finished when it is determined that the real-time motor power is the same as the re-checked power.

[0027] According to another aspect of the embodiments of the present invention, there is provided an air conditioner, wherein the air conditioner uses any one of the above-mentioned defrost control methods for the air conditioner.

[0028] According to another aspect of an embodiment of the present invention, there is further provided a computer-readable storage medium, the computer-readable storage medium comprising a stored program, wherein the program executes any one of the above-described defrost controls for the air conditioner.

[0029] According to another aspect of an embodiment of the present invention, a processor is further provided, wherein the processor is used to run a program, wherein the program executes any one of the above-mentioned defrost control methods for an air conditioner when running.

[0030] According to another aspect of an embodiment of the present invention, a computer program product is provided, comprising computer instructions, wherein when the computer instructions are executed by a processor, any one of the above-mentioned defrost control methods for an air conditioner is executed.

[0031] In an embodiment of the present invention, the retest power of the motor is determined according to the power difference between the actual motor power of the air conditioner motor at the current speed and the predetermined power, wherein the predetermined power is the theoretical motor power at the current speed pre-stored by the controller of the air conditioner; when it is determined that the outer tube temperature of the air conditioner is lower than the dew point temperature and the outdoor ambient temperature of the air conditioner is lower than the predetermined temperature, the real-time motor power of the air conditioner is obtained, wherein the outer tube temperature is the temperature of the outer tube of the evaporator in the air conditioner; the formation stage of the frost layer on the heat exchanger of the air conditioner is determined according to the retest power and the real-time motor power; the defrosting strategy for the air conditioner is determined according to the formation stage; and the air conditioner is controlled to perform the defrosting operation according to the defrosting strategy. Through the above technical scheme, the purpose of analyzing the growth of the frost layer on the heat exchanger of the air conditioner and controlling the air conditioner to perform intelligent defrosting in combination with the growth of the frost layer is achieved, the technical effect of estimating the growth of the frost layer and performing targeted defrosting is achieved, the accuracy of defrosting is improved, and energy is saved, thereby solving the technical problem that the traditional air conditioner defrosting method in the related technology does not estimate the frost layer condition, resulting in poor defrosting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0033] Figure 1 It is a hardware structure block diagram of a mobile terminal of a defrosting control method for an air conditioner according to an embodiment of the present invention;

[0034] Figure 2 is a flow chart of a defrost control method for an air conditioner according to an embodiment of the present invention;

[0035] Figure 3 is a flow chart of power rechecking when an air conditioner performs defrosting according to an embodiment of the present invention;

[0036] Figure 4 is a flow chart of an optional defrost control method for an air conditioner according to an embodiment of the present invention;

[0037] Figure 5is a schematic diagram of a fan characteristic curve of an air conditioner according to an embodiment of the present invention;

[0038] Figure 6 is a flow chart of another optional defrost control method for an air conditioner according to an embodiment of the present invention;

[0039] Figure 7 2 is a schematic diagram of a defrost control device for an air conditioner according to an embodiment of the present invention. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0041] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0042] As introduced in the background technology, the conventional air conditioner defrosting method in the related art does not predict the frost layer condition, resulting in poor defrosting effect. In view of the above defects, an air conditioner defrosting control method and device, an air conditioner, and a computer program product are provided in the embodiments of the present invention.

[0043] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0044] The method embodiments provided in the embodiments of the present invention can be executed in a mobile terminal, a computer terminal or a similar computing device. Taking running on a mobile terminal as an example, Figure 1 FIG. 1 is a hardware structure block diagram of a mobile terminal of a defrosting control method for an air conditioner according to an embodiment of the present invention. Figure 1 As shown, the mobile terminal may include one or more ( Figure 1Only one is shown in the figure) a processor 102 (the processor 102 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data, wherein the mobile terminal may also include a transmission device 106 and an input / output device 108 for communication functions. It can be understood by those skilled in the art that Figure 1 The structure shown is only for illustration and does not limit the structure of the mobile terminal. Figure 1 More or fewer components as shown, or with Figure 1 Different configurations are shown.

[0045] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the defrost control method of the air conditioner in the embodiment of the present invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, the above method is implemented. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include a memory remotely arranged relative to the processor 102, and these remote memories can be connected to the mobile terminal via a network. Examples of the above-mentioned network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof. The transmission device 106 is used to receive or send data via a network. The specific example of the above-mentioned network may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices through a base station so as 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.

[0046] According to an embodiment of the present invention, a method embodiment of a defrost control method for an air conditioner is provided. It should be noted that the steps shown in the flowchart of 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 can be executed in an order different from that shown here.

[0047] Figure 2 is a flow chart of a defrost control method for an air conditioner according to an embodiment of the present invention. Figure 2 As shown, the method comprises the following steps:

[0048] Step S202, determining the retest power of the motor according to the power difference between the actual motor power of the air conditioner motor at the current speed and the predetermined power, wherein the predetermined power is the theoretical motor power at the current speed pre-stored by the controller of the air conditioner.

[0049] In this embodiment, since the gap between the fins of the heat exchanger is small, it is easy to produce dirty blockage in the form of non-frosting. At this time, the resistance of the heat exchanger also increases accordingly, which will increase the risk of misjudgment. Therefore, it is necessary to re-check the motor power of the air conditioner and determine the re-check power of the motor based on the power difference between the actual motor power of the air conditioner at the current speed and the predetermined power.

[0050] Combine the following Figure 3 The above embodiments of the present invention are described in detail. Figure 3 1 is a flow chart of power rechecking when the air conditioner is defrosting according to an embodiment of the present invention.

[0051] According to the above embodiment of the present invention, in the above step S202, the re-test power of the motor is determined according to the power difference between the actual motor power of the air conditioner motor at the current speed and the predetermined power, including: obtaining the current speed of the motor; obtaining the actual motor power of the motor at the current speed; when the power difference between the actual motor power and the predetermined power is less than the power test value, determining the predetermined power as the re-test power, wherein the power test value is used to determine whether the motor has passed the re-test; when the power difference is not less than the power test value, determining the actual motor power as the re-test power.

[0052] like Figure 3 As shown, rechecking the motor power means comparing the motor power Ps (real-time motor power) at the speed with the comparison data B (predetermined power) stored in the air-conditioning controller for multiple times. If |Ps-B|≥Q (power test value), it is judged that the recheck fails, otherwise, it is considered that the recheck passes. When the recheck passes, the B value is assigned to A (recheck power). If the recheck passes, the subsequent step of monitoring the growth of frost on the heat exchanger of the air conditioner is entered. If the recheck fails, the recheck power function (|Ps-B|≥Q) is replaced (here Ps is replaced) and rechecked again. If it fails, the user will be prompted that the heat exchanger is dirty and blocked, and the Ps value is assigned to A.

[0053] Step S204, when it is determined that the outer tube temperature of the air conditioner is lower than the dew point temperature and the outdoor ambient temperature of the air conditioner is lower than a predetermined temperature, the real-time motor power of the air conditioner is obtained, wherein the outer tube temperature is the temperature of the outer tube of the evaporator in the air conditioner.

[0054] In this embodiment, whether the frosting condition is reached can be determined by determining whether the outer pipe temperature of the air conditioner is lower than the dew point temperature and whether the outdoor ambient temperature of the air conditioner is less than.

[0055] Step S206, determining the formation stage of the frost layer on the heat exchanger of the air conditioner according to the re-test power and the real-time motor power.

[0056] Combine the following Figure 4 The above embodiments of the present invention are described in detail. Figure 4 is a flow chart of an optional defrost control method for an air conditioner according to an embodiment of the present invention.

[0057] like Figure 4 As shown, the retest power can be input into the frost growth model to determine which stage the current frost layer is in. First, monitor whether the external pipe temperature T1 of the air conditioner is lower than the dew point temperature and whether the outdoor ambient temperature T2 of the air conditioner is less than. If it is monitored that T1 is less than the dew point temperature and T2< , it is considered that the frosting conditions are met at this time. If the frosting conditions are not met, monitoring will continue until the frosting conditions are met. The motor power data (real-time motor power) will be monitored at a certain frequency (the later the stage, the higher the frequency).

[0058] According to the above embodiment of the present invention, in the above step S206, determining the formation stage of the frost layer according to the re-test power and the real-time motor power includes: determining the start time of obtaining the real-time motor power, and determining a predetermined period after the start time as the frost core formation stage; and determining the power ratio of the re-test power to the real-time motor power by using a first formula, wherein the first formula is: , N represents the power ratio, A represents the re-test power, and P represents the real-time motor power; the formation stage of the frost layer is determined according to the comparison result between the power ratio and the power threshold.

[0059] As above Figure 4 As shown in the figure, when the motor power data (real-time motor power) is monitored at a certain frequency (the later the stage, the higher the frequency), the frost layer is predicted to be in the frost core formation stage (PART1). Then, the power ratio of the recheck power and the real-time motor power can be monitored. The relationship between the magnitude of the power threshold is used to determine the formation stage of the frost layer.

[0060] Specifically, in this embodiment, the power threshold includes: a first power threshold, a second power threshold, a third power threshold, a fourth power threshold and a fifth power threshold. The values ​​of the first power threshold, the second power threshold, the third power threshold, the fourth power threshold and the fifth power threshold increase successively when the power of the fan in the air conditioner increases with the air volume, and decrease successively when the power decreases with the air volume.

[0061] Combine the following Figure 5 The above embodiments of the present invention are described in detail. Figure 5 Schematic diagram of a fan characteristic curve of an air conditioner according to an embodiment of the present invention.

[0062] like Figure 5 The fan characteristic curve of the air conditioner shown in the figure includes: air volume static pressure curve (Psf), air volume total pressure curve (Ptf), air volume power curve (P), and fan efficiency curve (η). These characteristic curves are all under the same speed. Among them, the air volume static pressure curve (Psf) shows the change of air volume under different static pressure conditions when the speed remains unchanged; the air volume total pressure curve (Ptf) shows the change of air volume under different total pressure conditions when the speed remains unchanged; the air volume power curve (P) shows the change of power with air volume under the condition of constant speed and changing wind pressure; the fan efficiency curve (η) shows the change of fan efficiency with air volume under the condition of constant speed and changing wind pressure. Figure 5 It can be seen that the air volume power curve (P) is first in an increasing state and then in a decreasing state, so the values ​​of the first power threshold (P1), the second power threshold (P2), the third power threshold (P3), the fourth power threshold (P4) and the fifth power threshold (P5) increase successively when the power of the fan in the air conditioner increases with the air volume, and decrease successively when the power decreases with the air volume.

[0063] In the above-mentioned embodiment of the present invention, when the values ​​of the first power threshold, the second power threshold, the third power threshold, the fourth power threshold and the fifth power threshold increase successively, the formation stage of the frost layer is determined according to the comparison result of the power ratio and the power threshold, including: when it is determined that the power ratio is not less than the first power threshold and less than the second power threshold, the formation stage is determined to be the initial stage of frost layer growth; when it is determined that the power ratio is not less than the second power threshold and less than the third power threshold, the formation stage is determined to be the termination stage of frost layer growth; when it is determined that the power ratio is not less than the third power threshold and less than the fourth power threshold, the formation stage is determined to be the first frost layer formation stage; when it is determined that the power ratio is not less than the fourth power threshold and less than the fifth power threshold, the formation stage is determined to be the second frost layer formation stage; when it is determined that the power ratio is not less than the fifth power threshold, the formation stage is determined to be the stage requiring forced defrosting.

[0064] Specifically, as above Figure 4 As shown, when the values ​​of the first power threshold (P1), the second power threshold (P2), the third power threshold (P3), the fourth power threshold (P4) and the fifth power threshold (P5) increase in sequence, when the power is detected When the frost formation stage is the initial stage of frost growth (PART2); when the monitoring When the frost formation stage is the frost growth termination stage (PART3); when the monitoring When the frost formation stage is the first frost formation stage (PART4); when the monitoring When the frost formation stage is the second frost formation stage (PART5), When the frost layer is formed, it is the stage that requires forced defrosting.

[0065] In the above-mentioned embodiment of the present invention, when the values ​​of the first power threshold, the second power threshold, the third power threshold, the fourth power threshold and the fifth power threshold decrease in sequence, the formation stage of the frost layer is determined according to the comparison result of the power ratio and the power threshold, including: when it is determined that the power ratio is not less than the first power threshold, the formation stage is determined to be the initial stage of frost layer growth; when it is determined that the power ratio is not less than the second power threshold and is less than the first power threshold, the formation stage is determined to be the termination stage of frost layer growth; when it is determined that the power ratio is not less than the third power threshold and is less than the second power threshold, the formation stage is determined to be the first stage of frost layer formation; when it is determined that the power ratio is not less than the fourth power threshold and is less than the third power threshold, the formation stage is determined to be the second stage of frost layer formation; when it is determined that the power ratio is not less than the fifth power threshold and is less than the fourth power threshold, the formation stage is determined to be the stage requiring forced defrosting.

[0066] Specifically, as above Figure 4 As shown in FIG. 1 , when the values ​​of the first power threshold (P1), the second power threshold (P2), the third power threshold (P3), the fourth power threshold (P4) and the fifth power threshold (P5) decrease in sequence, when the power is detected When the frost formation stage is the initial stage of frost growth (PART2); when the monitoring When the frost formation stage is the frost growth termination stage (PART3); when the monitoring When the frost formation stage is the first frost formation stage (PART4); when the monitoring When the frost formation stage is the second frost formation stage (PART5), When the frost layer is formed, it is the stage that requires forced defrosting.

[0067] Step S208, determining a defrosting strategy for the air conditioner according to the formation stage.

[0068] In this embodiment, a corresponding defrosting strategy may be generated according to the current formation stage.

[0069] According to the above embodiment of the present invention, in the above step S208, the defrost strategy for the air conditioner is determined according to the formation stage, including: when the formation stage is the frost core formation stage or the initial stage of frost layer growth, the defrost strategy is determined as: no defrost operation is performed; when the formation stage is any one of the following: the frost layer growth termination stage, the first stage of frost layer formation, and the second stage of frost layer formation, the defrost strategy is determined as: when the ambient humidity of the current environment of the air conditioner meets the defrost conditions, the air conditioner is controlled to perform a defrost operation; when the formation stage is a forced defrost stage, the defrost strategy is determined as: the air conditioner is controlled to perform a defrost operation.

[0070] As above Figure 4 As shown, when the frost layer is in the frost core formation stage (PART1) and the initial stage of frost layer growth (PART2), no defrosting is required; when the frost layer is in the frost layer growth termination stage (PART3), the first frost layer formation stage (PART4) and the second frost layer formation stage (PART5), it is necessary to further monitor the ambient humidity and / or outdoor ambient temperature to determine whether defrosting is required; when the frost layer is in the stage where forced defrosting is required, reverse circulation is required for forced defrosting.

[0071] According to the above embodiment of the present invention, the defrost control method of the air conditioner also includes: obtaining the ambient humidity of the current environment of the air conditioner; when the formation stage is the termination stage of frost layer growth, determining the defrost condition as: the ambient humidity is not less than a first humidity threshold; when the formation stage is the first stage of frost layer formation, determining the defrost condition as: the ambient humidity is not less than the second humidity threshold and less than the first humidity threshold; when the formation stage is the second stage of frost layer formation, determining the defrost condition as: the ambient humidity is not less than a third humidity threshold and less than the second humidity threshold, wherein the first humidity threshold is greater than the second humidity threshold, and the second humidity threshold is greater than the first humidity threshold.

[0072] Combine the following Figure 6 The above embodiments of the present invention are described in detail. Figure 6 is a flow chart of another optional defrost control method for an air conditioner according to an embodiment of the present invention.

[0073] like Figure 6 As shown, when the frost layer is in the frost growth termination stage (PART3), if the current ambient humidity is not less than the first humidity threshold (S3), the air conditioner needs to be controlled for defrosting in PART3; when the frost layer is in the first frost formation stage (PART4), if the ambient humidity is not less than the second humidity threshold (S2) and less than the first humidity threshold (S3), the air conditioner needs to be controlled for defrosting in PART4; when the frost layer is in the second frost formation stage (PART5), if the ambient humidity is not less than the third humidity threshold (S1) and less than the second humidity threshold (S2), the air conditioner needs to be controlled for defrosting in PART5.

[0074] Since frost forms faster when humidity is high, defrost needs to be performed when the frost layer is smaller; when humidity is low, frost forms slower, so defrost can be performed when the frost layer is thicker.

[0075] In particular, according to the above embodiment of the present invention, the defrost control method of the air conditioner also includes: obtaining the current operating mode of the air conditioner; when it is determined that the current operating mode is the power saving mode, controlling the air conditioner to perform a defrost operation in the second stage of frost layer formation; when it is determined that the current operating mode is the heat preservation mode, controlling the air conditioner to perform a defrost operation in the first stage of frost layer formation.

[0076] As above Figure 6 As shown, if the current operating mode of the air conditioner set by the user is the power saving mode, the air conditioner needs to be controlled to defrost in PART5; if the current operating mode of the air conditioner set by the user is the heat preservation mode, the air conditioner needs to be controlled to defrost in PART4.

[0077] Step S210, controlling the air conditioner to perform a defrost operation according to the defrost strategy.

[0078] In this embodiment, the air conditioner may be controlled to perform a defrost operation according to the defrost strategy generated in the above step S208 to perform defrosting.

[0079] In addition, according to the above embodiment of the present invention, the defrost control method of the air conditioner further includes: when it is determined that the real-time motor power is the same as the re-checked power, determining that the defrost operation is finished.

[0080] As above Figure 4 And Figure 6 As shown, during the defrosting process, if the monitored motor power (here refers to the real-time motor power) is equal to the re-test power, it means that the defrosting operation has been completed, and the external pipe temperature of the air conditioner and the outdoor ambient temperature can be continuously monitored until the frosting conditions are met, and the above steps are repeated for the next defrosting.

[0081] From the above, it can be seen that through the technical scheme provided by the above embodiments of the present invention, the re-test power of the motor can be determined according to the power difference between the actual motor power of the air conditioner motor at the current speed and the predetermined power, wherein the predetermined power is the theoretical motor power at the current speed pre-stored by the controller of the air conditioner; when it is determined that the outer tube temperature of the air conditioner is lower than the dew point temperature and the outdoor ambient temperature of the air conditioner is lower than the predetermined temperature, the real-time motor power of the air conditioner is obtained, wherein the outer tube temperature is the temperature of the outer tube of the evaporator in the air conditioner; the formation stage of the frost layer on the heat exchanger of the air conditioner is determined according to the re-test power and the real-time motor power; the defrost strategy for the air conditioner is determined according to the formation stage; the air conditioner is controlled to perform the defrost operation according to the defrost strategy, thereby achieving the purpose of analyzing the growth of the frost layer on the heat exchanger of the air conditioner and controlling the air conditioner to perform intelligent defrosting in combination with the growth of the frost layer, realizing the technical effect of estimating the growth of the frost layer and performing targeted defrosting, improving the accuracy of defrosting, and saving energy.

[0082] Therefore, the technical solution provided by the above-mentioned embodiment of the present invention solves the technical problem that the traditional air conditioner defrosting method in the related art does not predict the frost layer condition, resulting in poor defrosting effect.

[0083] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0084] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0085] According to an embodiment of the present invention, there is also provided a defrost control device for an air conditioner for implementing the defrost control method for an air conditioner. Figure 7 Schematic diagram of a defrost control device for an air conditioner according to an embodiment of the present invention. Figure 7As shown, the device comprises: a first determining unit 71, an acquiring unit 73, a second determining unit 75, a third determining unit 77 and a control unit 79. The defrosting control device for the air conditioner is described in detail below.

[0086] The first determination unit 71 is used to determine the retest power of the motor according to the power difference between the actual motor power of the air conditioner motor at the current speed and the predetermined power, wherein the predetermined power is the theoretical motor power at the current speed pre-stored by the controller of the air conditioner.

[0087] The acquisition unit 73 is used to acquire the real-time motor power of the air conditioner when it is determined that the outer tube temperature of the air conditioner is lower than the dew point temperature and the outdoor ambient temperature of the air conditioner is lower than a predetermined temperature, wherein the outer tube temperature is the temperature of the outer tube of the evaporator in the air conditioner.

[0088] The second determining unit 75 is used to determine the formation stage of the frost layer on the heat exchanger of the air conditioner according to the re-test power and the real-time motor power.

[0089] The third determining unit 77 is used to determine a defrosting strategy for the air conditioner according to the forming stage.

[0090] The control unit 79 is used to control the air conditioner to perform a defrost operation according to a defrost strategy.

[0091] It should be noted here that the above-mentioned first determination unit 71, acquisition unit 73, second determination unit 75, third determination unit 77 and control unit 79 correspond to steps S202 to S210 in the above-mentioned embodiments, and the five units are the same as the instances and application scenarios implemented by the corresponding steps, but are not limited to the contents disclosed in the above-mentioned embodiments.

[0092] As can be seen from the above, in the scheme recorded in the above-mentioned embodiment of the present invention, the first determination unit can be used to determine the re-test power of the motor according to the power difference between the actual motor power of the air conditioner at the current speed and the predetermined power, wherein the predetermined power is the theoretical motor power at the current speed pre-stored by the controller of the air conditioner; the acquisition unit acquires the real-time motor power of the air conditioner when it is determined that the outer tube temperature of the air conditioner is lower than the dew point temperature and the outdoor ambient temperature of the air conditioner is lower than the predetermined temperature, wherein the outer tube temperature is the temperature of the outer tube of the evaporator in the air conditioner; the second determination unit determines the formation stage of the frost layer on the heat exchanger of the air conditioner according to the re-test power and the real-time motor power; the third determination unit determines the defrost strategy for the air conditioner according to the formation stage; the control unit controls the air conditioner to perform the defrost operation according to the defrost strategy, thereby achieving the purpose of analyzing the growth of the frost layer on the heat exchanger of the air conditioner and controlling the air conditioner to perform intelligent defrosting in combination with the growth of the frost layer, realizing the technical effect of estimating the growth of the frost layer and performing targeted defrosting, improving the accuracy of defrosting, and saving energy.

[0093] Therefore, the technical solution provided by the above-mentioned embodiment of the present invention solves the technical problem that the traditional air conditioner defrosting method in the related art does not predict the frost layer condition, resulting in poor defrosting effect.

[0094] Optionally, the first determination unit includes: a first acquisition module, used to acquire the current speed of the motor; a second acquisition module, used to acquire the actual motor power of the motor at the current speed; the first determination module, used to determine that the predetermined power is the re-test power when the power difference between the actual motor power and the predetermined power is less than the power test value, wherein the power test value is used to determine whether the motor has passed the re-test; the second determination module, used to determine that the actual motor power is the re-test power when the power difference is not less than the power test value.

[0095] Optionally, the second determination unit includes: a third determination module, used to determine the start time of obtaining the real-time motor power, and determine the predetermined period after the start time as the frost core formation stage; a fourth determination module, used to determine the power ratio of the re-check power and the real-time motor power by using the first formula, wherein the first formula is: , N represents the power ratio, A represents the re-test power, and P represents the real-time motor power; a fifth determination module is used to determine the formation stage of the frost layer according to the comparison result of the power ratio and the power threshold.

[0096] Optionally, the power threshold includes: a first power threshold, a second power threshold, a third power threshold, a fourth power threshold and a fifth power threshold. The defrost control device of the air conditioner also includes: a value taking unit, which is used to take the values ​​of the first power threshold, the second power threshold, the third power threshold, the fourth power threshold and the fifth power threshold so that the power of the fan in the air conditioner increases successively as the air volume increases, and decreases successively when the power decreases with the air volume.

[0097] Optionally, when the values ​​of the first power threshold, the second power threshold, the third power threshold, the fourth power threshold and the fifth power threshold increase successively, the second determination unit includes: a sixth determination module, used to determine that the formation stage is the initial stage of frost layer growth when it is determined that the power ratio is not less than the first power threshold and less than the second power threshold; a seventh determination module, used to determine that the formation stage is the termination stage of frost layer growth when it is determined that the power ratio is not less than the second power threshold and less than the third power threshold; an eighth determination module, used to determine that the formation stage is the first frost layer formation stage when it is determined that the power ratio is not less than the third power threshold and less than the fourth power threshold; a ninth determination module, used to determine that the formation stage is the second frost layer formation stage when it is determined that the power ratio is not less than the fourth power threshold and less than the fifth power threshold; and a tenth determination module, used to determine that the formation stage is a stage requiring forced defrosting when it is determined that the power ratio is not less than the fifth power threshold.

[0098] Optionally, when the values ​​of the first power threshold, the second power threshold, the third power threshold, the fourth power threshold and the fifth power threshold decrease in sequence, the second determination unit includes: an eleventh determination module, which is used to determine that the formation stage is the initial stage of frost layer growth when it is determined that the power ratio is not less than the first power threshold; a twelfth determination module, which is used to determine that the formation stage is the termination stage of frost layer growth when it is determined that the power ratio is not less than the second power threshold and is less than the first power threshold; a thirteenth determination module, which is used to determine that the formation stage is the first stage of frost layer formation when it is determined that the power ratio is not less than the third power threshold and is less than the second power threshold; a fourteenth determination module, which is used to determine that the formation stage is the second stage of frost layer formation when it is determined that the power ratio is not less than the fourth power threshold and is less than the third power threshold; a fifteenth determination module, which is used to determine that the formation stage is a stage requiring forced defrosting when it is determined that the power ratio is not less than the fifth power threshold and is less than the fourth power threshold.

[0099] Optionally, the third determination unit includes: a sixteenth determination module, which is used to determine the defrost strategy as follows: no defrost operation is performed when the formation stage is a frost core formation stage or an initial stage of frost layer growth; a seventeenth determination module, which is used to determine the defrost strategy as follows: when the ambient humidity of the current environment of the air conditioner meets the defrost conditions, the air conditioner is controlled to perform a defrost operation when the formation stage is a forced defrost stage.

[0100] Optionally, the defrost control device of the air conditioner also includes: a third acquisition module, used to acquire the ambient humidity of the current environment of the air conditioner; a nineteenth determination module, used to determine the defrost condition when the formation stage is the termination stage of frost layer growth: the ambient humidity is not less than a first humidity threshold; a twentieth determination module, used to determine the defrost condition when the formation stage is the first stage of frost layer formation: the ambient humidity is not less than a second humidity threshold and is less than the first humidity threshold; a twenty-first determination module, used to determine the defrost condition when the formation stage is the second stage of frost layer formation: the ambient humidity is not less than a third humidity threshold and is less than the second humidity threshold, wherein the first humidity threshold is greater than the second humidity threshold, and the second humidity threshold is greater than the first humidity threshold.

[0101] Optionally, the defrost control device of the air conditioner also includes: a fourth acquisition module, used to obtain the current operating mode of the air conditioner; a first control module, used to control the air conditioner to perform a defrost operation in the second stage of frost layer formation when it is determined that the current operating mode is a power saving mode; and a second control module, used to control the air conditioner to perform a defrost operation in the first stage of frost layer formation when it is determined that the current operating mode is a heat preservation mode.

[0102] Optionally, the defrost control device of the air conditioner further comprises: a fourth determination unit, configured to determine that the defrost operation is finished when it is determined that the real-time motor power is the same as the re-checked power.

[0103] According to another aspect of the embodiments of the present invention, an air conditioner is provided. The air conditioner uses any one of the above-mentioned defrost control methods for the air conditioner.

[0104] According to another aspect of an embodiment of the present invention, there is further provided a computer-readable storage medium, the computer-readable storage medium comprising a stored program, wherein the program executes any one of the above-mentioned defrost controls for the air conditioner.

[0105] Optionally, in this embodiment, the computer-readable storage medium may be located in any one of the computer terminals in a computer terminal group in a computer network, or in any one of the communication devices in a communication device group.

[0106] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: determining the re-test power of the motor according to the power difference between the actual motor power of the air conditioner at the current speed and the predetermined power, wherein the predetermined power is the theoretical motor power at the current speed pre-stored by the controller of the air conditioner; when it is determined that the outer tube temperature of the air conditioner is lower than the dew point temperature and the outdoor ambient temperature of the air conditioner is lower than the predetermined temperature, obtaining the real-time motor power of the air conditioner, wherein the outer tube temperature is the temperature of the outer tube of the evaporator in the air conditioner; determining the formation stage of the frost layer on the heat exchanger of the air conditioner according to the re-test power and the real-time motor power; determining the defrost strategy for the air conditioner according to the formation stage; and controlling the air conditioner to perform the defrost operation according to the defrost strategy.

[0107] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: obtaining the current speed of the motor; obtaining the actual motor power of the motor at the current speed; determining the predetermined power as the re-test power when the power difference between the actual motor power and the predetermined power is less than the power test value, wherein the power test value is used to determine whether the motor passes the re-test; determining the actual motor power as the re-test power when the power difference is not less than the power test value.

[0108] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: determining a start time for acquiring the real-time motor power, and determining a predetermined period after the start time as a frost core formation stage; and determining a power ratio of the recheck power to the real-time motor power using a first formula, wherein the first formula is: , N represents the power ratio, A represents the re-test power, and P represents the real-time motor power; the formation stage of the frost layer is determined according to the comparison result between the power ratio and the power threshold.

[0109] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: the values ​​of the first power threshold, the second power threshold, the third power threshold, the fourth power threshold and the fifth power threshold increase successively when the power of the fan in the air conditioner increases with the air volume, and decrease successively when the power decreases with the air volume.

[0110] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: when it is determined that the power ratio is not less than a first power threshold and less than a second power threshold, determining that the formation stage is an initial stage of frost layer growth; when it is determined that the power ratio is not less than the second power threshold and less than a third power threshold, determining that the formation stage is a termination stage of frost layer growth; when it is determined that the power ratio is not less than the third power threshold and less than a fourth power threshold, determining that the formation stage is a first frost layer formation stage; when it is determined that the power ratio is not less than the fourth power threshold and less than the fifth power threshold, determining that the formation stage is a second frost layer formation stage; when it is determined that the power ratio is not less than the fifth power threshold, determining that the formation stage is a stage requiring forced defrosting.

[0111] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: when it is determined that the power ratio is not less than a first power threshold, the formation stage is determined to be an initial stage of frost layer growth; when it is determined that the power ratio is not less than a second power threshold and is less than the first power threshold, the formation stage is determined to be a termination stage of frost layer growth; when it is determined that the power ratio is not less than a third power threshold and is less than the second power threshold, the formation stage is determined to be a first stage of frost layer formation; when it is determined that the power ratio is not less than a fourth power threshold and is less than the third power threshold, the formation stage is determined to be a second stage of frost layer formation; when it is determined that the power ratio is not less than a fifth power threshold and is less than the fourth power threshold, the formation stage is determined to be a stage requiring forced defrosting.

[0112] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: when the formation stage is a frost core formation stage or an initial stage of frost layer growth, determining the defrost strategy as: not performing a defrost operation; when the formation stage is any one of the following: a frost layer growth termination stage, a first stage of frost layer formation, or a second stage of frost layer formation, determining the defrost strategy as: when the ambient humidity of the current environment in which the air conditioner is located meets the defrost conditions, controlling the air conditioner to perform a defrost operation; when the formation stage is a stage requiring forced defrost, determining the defrost strategy as: controlling the air conditioner to perform a defrost operation.

[0113] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: obtaining the ambient humidity of the current environment of the air conditioner; when the formation stage is the termination stage of frost layer growth, determining the defrost condition as: the ambient humidity is not less than a first humidity threshold; when the formation stage is the first stage of frost layer formation, determining the defrost condition as: the ambient humidity is not less than a second humidity threshold and less than the first humidity threshold; when the formation stage is the second stage of frost layer formation, determining the defrost condition as: the ambient humidity is not less than a third humidity threshold and less than the second humidity threshold, wherein the first humidity threshold is greater than the second humidity threshold, and the second humidity threshold is greater than the first humidity threshold.

[0114] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: obtaining the current operating mode of the air conditioner; when it is determined that the current operating mode is the power saving mode, controlling the air conditioner to perform a defrost operation in the second stage of frost layer formation; when it is determined that the current operating mode is the heat preservation mode, controlling the air conditioner to perform a defrost operation in the first stage of frost layer formation.

[0115] Optionally, in this embodiment, the computer-readable storage medium is configured to store a program code for executing the following steps: when it is determined that the real-time motor power is the same as the recheck power, determining that the defrost operation is finished.

[0116] According to another aspect of an embodiment of the present invention, a processor is further provided, and the processor is used to run a program, wherein when the program is run, any one of the above-mentioned defrost control methods for an air conditioner is executed.

[0117] According to another aspect of an embodiment of the present invention, a computer program product is provided, comprising computer instructions, and when the computer instructions are executed by a processor, any one of the above-mentioned defrost control methods for an air conditioner is executed.

[0118] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0119] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0120] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0121] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0122] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0123] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk, etc. Various media that can store program codes.

[0124] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A defrosting control method for an air conditioner, characterized in that: include: Determining the retest power of the motor according to the power difference between the actual motor power of the motor of the air conditioner at the current speed and the predetermined power, wherein the predetermined power is the theoretical motor power at the current speed pre-stored by the controller of the air conditioner, and determining the retest power of the motor according to the power difference between the actual motor power of the motor of the air conditioner at the current speed and the predetermined power, comprising: obtaining the current speed of the motor; obtaining the actual motor power of the motor at the current speed; when the power difference between the actual motor power and the predetermined power is less than a power inspection value, determining the predetermined power as the retest power, wherein the power inspection value is used to determine whether the motor passes the retest; when the power difference is not less than the power inspection value, determining the actual motor power as the retest power; When it is determined that the outer tube temperature of the air conditioner is lower than the dew point temperature and the outdoor ambient temperature of the air conditioner is lower than a predetermined temperature, obtaining the real-time motor power of the air conditioner, wherein the outer tube temperature is the temperature of the outer tube of the evaporator in the air conditioner; The formation stage of the frost layer on the heat exchanger of the air conditioner is determined according to the re-test power and the real-time motor power, wherein the formation stage of the frost layer is determined according to the re-test power and the real-time motor power, including: determining the start time of obtaining the real-time motor power, and determining a predetermined period after the start time as a frost core formation stage; and determining a power ratio of the re-test power to the real-time motor power by using a first formula, wherein the first formula is: , N represents the power ratio, A represents the re-test power, and P represents the real-time motor power; the formation stage of the frost layer is determined according to the comparison result of the power ratio and the power threshold, the power threshold includes: a first power threshold, a second power threshold, a third power threshold, a fourth power threshold and a fifth power threshold, the first power threshold, the second power threshold, the third power threshold, the fourth power threshold and the fifth power threshold are successively increased when the power of the fan in the air conditioner increases with the air volume, and are successively decreased when the power decreases with the air volume; determining a defrosting strategy for the air conditioner according to the formation stage; The air conditioner is controlled to perform a defrost operation according to the defrost strategy.

2. The defrosting control method for an air conditioner according to claim 1, characterized in that: When the values ​​of the first power threshold, the second power threshold, the third power threshold, the fourth power threshold and the fifth power threshold are increased in sequence, determining the formation stage of the frost layer according to the comparison result of the power ratio and the power threshold, includes: When it is determined that the power ratio is not less than the first power threshold and less than the second power threshold, determining that the formation stage is an initial stage of frost layer growth; When it is determined that the power ratio is not less than the second power threshold and less than the third power threshold, determining that the formation stage is a frost layer growth termination stage; When it is determined that the power ratio is not less than the third power threshold and less than the fourth power threshold, determining that the formation stage is the first frost layer formation stage; When it is determined that the power ratio is not less than the fourth power threshold and less than the fifth power threshold, determining that the formation stage is a second frost layer formation stage; When it is determined that the power ratio is not less than the fifth power threshold, the forming stage is determined to be a stage requiring forced defrosting.

3. The defrosting control method for an air conditioner according to claim 1, characterized in that: When the values ​​of the first power threshold, the second power threshold, the third power threshold, the fourth power threshold, and the fifth power threshold decrease in sequence, determining the formation stage of the frost layer according to the comparison result of the power ratio and the power threshold includes: When it is determined that the power ratio is not less than the first power threshold, determining that the formation stage is an initial stage of frost layer growth; When it is determined that the power ratio is not less than the second power threshold and less than the first power threshold, determining that the formation stage is a frost layer growth termination stage; When it is determined that the power ratio is not less than the third power threshold and less than the second power threshold, determining that the formation stage is a first frost layer formation stage; When it is determined that the power ratio is not less than the fourth power threshold and less than the third power threshold, determining that the formation stage is a second frost layer formation stage; When it is determined that the power ratio is not less than the fifth power threshold and less than the fourth power threshold, the forming stage is determined to be a stage requiring forced defrosting.

4. The defrosting control method for an air conditioner according to any one of claims 2 or 3, characterized in that: Determining a defrosting strategy for the air conditioner according to the formation stage includes: When the formation stage is the frost core formation stage or the frost layer growth initial stage, determining the defrost strategy as: not performing the defrost operation; When the formation stage is any one of the following: the frost layer growth termination stage, the first frost layer formation stage, and the second frost layer formation stage, determining the defrost strategy is: when the ambient humidity of the current environment of the air conditioner meets the defrost condition, controlling the air conditioner to perform the defrost operation; When the forming stage is the forced defrosting stage, the defrosting strategy is determined as: controlling the air conditioner to perform the defrosting operation.

5. The defrosting control method for an air conditioner according to claim 4, characterized in that: Also includes: Obtaining the ambient humidity of the current environment of the air conditioner; When the formation stage is the frost layer growth termination stage, the defrosting condition is determined as follows: the ambient humidity is not less than a first humidity threshold; When the formation stage is the first frost layer formation stage, the defrosting condition is determined as follows: the ambient humidity is not less than a second humidity threshold and less than the first humidity threshold; When the formation stage is the second frost layer formation stage, the defrost condition is determined as follows: the ambient humidity is not less than a third humidity threshold and is less than the second humidity threshold, wherein the first humidity threshold is greater than the second humidity threshold, and the second humidity threshold is greater than the third humidity threshold.

6. The defrosting control method for an air conditioner according to claim 4, characterized in that: Also includes: Acquire the current operation mode of the air conditioner; When it is determined that the current operation mode is the power saving mode, controlling the air conditioner to perform the defrosting operation in the second frost layer formation stage; When it is determined that the current operation mode is the heat preservation mode, the air conditioner is controlled to perform the defrosting operation in the first frost layer formation stage.

7. The defrosting control method for an air conditioner according to claim 1, characterized in that: Also includes: When it is determined that the real-time motor power is the same as the re-check power, it is determined that the defrosting operation is completed.

8. A defrost control device for an air conditioner, characterized in that: include: a first determining unit, for determining the retest power of the motor according to the power difference between the actual motor power of the motor of the air conditioner at the current speed and the predetermined power, wherein the predetermined power is the theoretical motor power at the current speed pre-stored by the controller of the air conditioner, and the first determining unit comprises: a first acquisition module, for acquiring the current speed of the motor; a second acquisition module, for acquiring the actual motor power of the motor at the current speed; a first determining module, for determining that the predetermined power is the retest power when the power difference between the actual motor power and the predetermined power is less than a power inspection value, wherein the power inspection value is used to determine whether the motor passes the retest; a second determining module, for determining that the actual motor power is the retest power when the power difference is not less than the power inspection value; an acquisition unit, configured to acquire the real-time motor power of the air conditioner when it is determined that the outer tube temperature of the air conditioner is lower than the dew point temperature and the outdoor ambient temperature of the air conditioner is lower than a predetermined temperature, wherein the outer tube temperature is the temperature of the outer tube of the evaporator in the air conditioner; a second determination unit, for determining the formation stage of the frost layer on the heat exchanger of the air conditioner according to the re-test power and the real-time motor power, wherein the second determination unit comprises: a third determination module, for determining the start time of obtaining the real-time motor power, and determining a predetermined period after the start time as the frost core formation stage; a fourth determination module, for determining the power ratio of the re-test power to the real-time motor power by using a first formula, wherein the first formula is: , N represents the power ratio, A represents the re-test power, and P represents the real-time motor power; a fifth determination module, used to determine the formation stage of the frost layer according to the comparison result of the power ratio and the power threshold; the power threshold includes: a first power threshold, a second power threshold, a third power threshold, a fourth power threshold and a fifth power threshold, and the defrost control device of the air conditioner also includes: a value taking unit, used for taking the values ​​of the first power threshold, the second power threshold, the third power threshold, the fourth power threshold and the fifth power threshold in the air conditioner, when the power of the fan increases with the air volume, the values ​​increase successively, and when the power decreases with the air volume, the values ​​decrease successively; a third determining unit, configured to determine a defrosting strategy for the air conditioner according to the forming stage; A control unit is used to control the air conditioner to perform a defrost operation according to the defrost strategy.

9. An air conditioner, characterized in that: The air conditioner uses the defrost control method for the air conditioner according to any one of claims 1 to 7.

10. A computer program product comprising computer instructions, characterized in that: When the computer instructions are executed by the processor, the defrost control method for the air conditioner according to any one of claims 1 to 7 is performed.

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