Defrosting control method and device of air conditioner, and air conditioner

Abstract

The application discloses a defrosting control method and device of an air conditioner and the air conditioner. The method comprises the following steps: when it is determined that the temperature of an outdoor coil is lower than a threshold value of the temperature of the outdoor coil, controlling the indoor fan and the air deflector of the air conditioner to be closed; after it is determined that the time length during which the indoor fan and the air deflector are closed reaches a predetermined time length, controlling the air conditioner to enter a defrosting stage; after it is determined that the air conditioner enters the defrosting stage, acquiring the indoor ambient temperature of a room where the air conditioner is located and the indoor coil temperature of an outdoor heat exchanger of the air conditioner according to a first predetermined period; and when it is determined that the temperature difference between the indoor ambient temperature and the indoor coil temperature is greater than a predetermined temperature, controlling the indoor fan to stop running. The application solves the technical problem that, in the related art, the indoor heat exchanger is prone to frosting due to excessively low temperature in the defrosting mode of the air conditioner under a heating working condition, which affects the defrosting efficiency of the outdoor heat exchanger, and further leads to the reduction of the heat release efficiency of the outdoor heat exchanger and the slow defrosting speed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of home appliance control, in particular to a defrosting control method and device of an air conditioner and the air conditioner. BACKGROUND

[0002] When the air conditioner is in heating operation, the refrigerant exchanges heat with outdoor air through the outdoor heat exchanger, absorbs heat from the outdoor air to evaporate, enters the compressor, is compressed into high-temperature and high-pressure refrigerant vapor by the compressor, and enters the indoor heat exchanger to release heat; the indoor heat exchanger releases heat to heat indoor air to provide a more comfortable environment for users.

[0003] However, when the outdoor environment temperature drops to a certain extent, frost will form on the surface of the outdoor heat exchanger, and as the frost layer becomes thicker, the use effect of the air conditioning system will become worse, further affecting the heating performance and the comfort of the air conditioner. At present, the air conditioner absorbs heat in the indoor heat exchanger to release heat in the outdoor heat exchanger to defrost during the defrosting phase, at this time the indoor unit of the air conditioner is in a refrigeration state, however, the temperature of the indoor heat exchanger coil drops rapidly and even frost forms, which increases the heat resistance of the heat exchanger and reduces the heat exchange capacity, thereby affecting the defrosting efficiency of the outdoor heat exchanger, which leads to low heat release efficiency of the outdoor heat exchanger and slow defrosting speed.

[0004] In view of the problem in the above related technology that the indoor heat exchanger is prone to frost formation due to excessively low temperature in the defrosting mode under the heating condition of the air conditioner, which affects the defrosting efficiency of the outdoor heat exchanger and further leads to low heat release efficiency of the outdoor heat exchanger and slow defrosting speed, no effective solution has been proposed so far. SUMMARY

[0005] The defrosting control method and device of the air conditioner and the air conditioner provided in the embodiments of the present application at least solve the technical problem in the related art that the indoor heat exchanger is prone to frost formation due to excessively low temperature in the defrosting mode under the heating condition of the air conditioner, which affects the defrosting efficiency of the outdoor heat exchanger and further leads to low heat release efficiency of the outdoor heat exchanger and slow defrosting speed.

[0006] According to an aspect of the embodiments of the present application, a defrosting control method of an air conditioner is provided, comprising: obtaining an outdoor coil temperature of an outdoor heat exchanger of the air conditioner when it is determined that the air conditioner is running in a heating mode; controlling an indoor fan and a guide vane of the air conditioner to be both closed to store heat generated before the air conditioner enters a defrosting phase when it is determined that the outdoor coil temperature is lower than an outdoor coil temperature threshold; controlling the air conditioner to enter the defrosting phase after a time length during which the indoor fan and the guide vane are both closed reaches a predetermined time length; obtaining an indoor environment temperature of a room in which the air conditioner is located and an indoor coil temperature of the outdoor heat exchanger of the air conditioner according to a first predetermined period after it is determined that the air conditioner enters the defrosting phase; and controlling the indoor fan to stop running when it is determined that a temperature difference between the indoor environment temperature and the indoor coil temperature is greater than a predetermined temperature.

[0007] Optionally, the obtaining of the outdoor coil temperature of the outdoor heat exchanger of the air conditioner comprises: triggering a temperature collection device to collect a plurality of the outdoor coil temperatures of the outdoor heat exchanger according to a second predetermined period within a predetermined time period; and obtaining the plurality of the outdoor coil temperatures collected by the temperature collection device.

[0008] Optionally, the controlling of the indoor fan and the guide vane of the air conditioner to be both closed when it is determined that the outdoor coil temperature is lower than the outdoor coil temperature threshold comprises: comparing the plurality of the outdoor coil temperatures with the outdoor coil temperature threshold respectively to obtain comparison results; and controlling the indoor fan and the guide vane of the air conditioner to be both closed when the comparison results indicate that at least one of the outdoor coil temperatures is lower than the outdoor coil temperature threshold.

[0009] Optionally, the defrosting control method of the air conditioner further comprises: obtaining an outdoor environment temperature of the air conditioner; and adjusting the outdoor coil temperature threshold according to the outdoor environment temperature.

[0010] Optionally, the controlling of the air conditioner to enter the defrosting phase comprises: controlling a compressor of the air conditioner to stop running; and controlling a four-way valve of the air conditioner to reverse.

[0011] Optionally, the defrosting control method of the air conditioner further comprises: controlling a current rotating speed of the indoor fan of the air conditioner to be reduced by a predetermined rotating speed and simultaneously controlling the indoor fan to be switched from forward rotation to reverse rotation so that an air outlet of the indoor fan is converted into an air inlet and the air inlet of the indoor fan is converted into the air outlet after it is determined that the air conditioner enters the defrosting phase.

[0012] Optionally, the defrosting control method of the air conditioner further comprises: continuing to control the indoor fan to run in reverse according to the adjusted current rotating speed when it is determined that the temperature difference between the indoor environment temperature and the indoor coil temperature is not greater than the predetermined temperature.

[0013] According to another aspect of the present invention, a defrosting control device for an air conditioner is also provided, comprising: a first acquisition unit, configured to acquire the outdoor coil temperature of the outdoor heat exchanger of the air conditioner when it is determined that the air conditioner is operating in heating mode; a first control unit, configured to control the indoor fan and air guide vane of the air conditioner to be turned off when it is determined that the outdoor coil temperature is lower than the outdoor coil temperature threshold, so as to store the heat generated before the air conditioner enters the defrosting stage; a second control unit, configured to control the air conditioner to enter the defrosting stage after it is determined that the indoor fan and air guide vane have been turned off for a predetermined period of time; a second acquisition unit, configured to acquire the indoor ambient temperature of the room where the air conditioner is located and the indoor coil temperature of the outdoor heat exchanger of the air conditioner according to a first predetermined cycle after it is determined that the air conditioner has entered the defrosting stage; and a third control unit, configured to control the indoor fan to stop operating when it is determined that the temperature difference between the indoor ambient temperature and the indoor coil temperature is greater than a predetermined temperature.

[0014] Optionally, the first acquisition unit includes: an acquisition module, configured to trigger a temperature acquisition device to acquire the temperatures of multiple outdoor coils of the outdoor heat exchanger according to a second predetermined cycle within a predetermined time period; and a first acquisition module, configured to acquire the temperatures of the multiple outdoor coils acquired by the temperature acquisition device.

[0015] Optionally, the first control unit includes: a comparison module, configured to compare the temperatures of multiple outdoor coils with the outdoor coil temperature threshold to obtain a comparison result; and a first control module, configured to control the indoor fan and the air guide plate of the air conditioner to be turned off when the comparison result indicates that at least one outdoor coil temperature is lower than the outdoor coil temperature threshold.

[0016] Optionally, the defrosting control device of the air conditioner further includes: a third acquisition unit for acquiring the outdoor ambient temperature of the air conditioner; and an adjustment unit for adjusting the outdoor coil temperature threshold according to the outdoor ambient temperature.

[0017] Optionally, the second control unit includes: a second control module for controlling the compressor of the air conditioner to stop running; and a third control module for controlling the reversing of the four-way valve of the air conditioner.

[0018] Optionally, the defrosting control device of the air conditioner further includes: a fourth control unit, which, after determining that the air conditioner has entered the defrosting stage, controls the current speed of the indoor fan of the air conditioner to decrease to a predetermined speed, and simultaneously controls the indoor fan to switch from forward operation to reverse operation, so that the air outlet of the indoor fan is converted into the air inlet, and the air inlet of the indoor fan is converted into the air outlet.

[0019] Optionally, the defrosting control device of the air conditioner further includes: a fifth control unit, used to continue controlling the indoor fan to run in reverse at the adjusted current speed when it is determined that the temperature difference between the indoor ambient temperature and the indoor coil temperature is not greater than the predetermined temperature.

[0020] According to another aspect of the present invention, an air conditioner is also provided, which uses the defrosting control method of any one of the above-described air conditioners.

[0021] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored program, wherein the program executes the defrosting control method for an air conditioner described in any one of the above embodiments.

[0022] According to another aspect of the present invention, a processor is also provided, the processor being configured to run a program, wherein the program, when running, executes the defrosting control method for an air conditioner as described in any of the above embodiments.

[0023] In this embodiment of the invention, when it is determined that the air conditioner is operating in heating mode, the outdoor coil temperature of the outdoor heat exchanger of the air conditioner is acquired; when it is determined that the outdoor coil temperature is lower than the outdoor coil temperature threshold, the indoor fan and air guide of the air conditioner are both shut down to store the heat generated before the air conditioner enters the defrosting stage; after it is determined that the indoor fan and air guide have been shut down for a predetermined period of time, the air conditioner is controlled to enter the defrosting stage; after it is determined that the air conditioner has entered the defrosting stage, the indoor ambient temperature of the room where the air conditioner is located and the indoor coil temperature of the outdoor heat exchanger of the air conditioner are acquired according to a first predetermined cycle; when it is determined that the temperature difference between the indoor ambient temperature and the indoor coil temperature is greater than a predetermined temperature, the indoor fan is controlled to stop running. The defrosting control method for air conditioners provided by this invention achieves the goal of controlling the indoor fan and air guide plate of the air conditioner to be closed for a period of time before the air conditioner enters the defrosting stage, so as to store the heat generated by the air conditioner entering the defrosting stage and provide heat during the defrosting period, thereby reducing the impact on the defrosting efficiency of the outdoor heat exchanger. This achieves the technical effect of improving the defrosting speed of the air conditioner, and solves the technical problem in related technologies that the indoor heat exchanger of the air conditioner is prone to excessively low temperature and frost formation during the defrosting mode under heating conditions, which affects the defrosting efficiency of the outdoor heat exchanger, and thus leads to a decrease in the heat release efficiency of the outdoor heat exchanger and a slow defrosting speed. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0025] Figure 1 This is a hardware structure block diagram of a mobile terminal for a defrosting control method for an air conditioner according to an embodiment of the present invention.

[0026] Figure 2 This is a flowchart of a defrosting control method for an air conditioner according to an embodiment of the present invention;

[0027] Figure 3 This is a flowchart of an optional defrosting control method for an air conditioner according to an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of a defrosting control device for an air conditioner according to an embodiment of the present invention.

[0029] The above figures include the following reference numerals:

[0030] 102. Processor; 104. Memory; 106. Transmission device; 108. Input / output device. Detailed Implementation

[0031] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0032] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0033] As described in the background section, in related technologies, during the defrosting mode of an air conditioner in heating operation, the indoor heat exchanger is prone to excessively low temperatures and frost formation, affecting the defrosting efficiency of the outdoor heat exchanger. This, in turn, leads to a decrease in the heat release efficiency of the outdoor heat exchanger and a slow defrosting speed. In embodiments of the present invention, a defrosting control method and apparatus for an air conditioner, an air conditioner, a computer-readable storage medium, and a processor are provided.

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0035] The methods and embodiments provided in this invention can be executed on a mobile terminal, a computer terminal, or a similar computing device. Taking running on a mobile terminal as an example, Figure 1 This is a hardware structure block diagram of a mobile terminal for a defrosting control method for an air conditioner according to an embodiment of the present invention. Figure 1 As shown, a mobile terminal may include one or more ( Figure 1 Only one is shown in the diagram. A processor 102 (which may include, but is not limited to, a microprocessor MCU or a programmable logic device FPGA, etc.) and a memory 104 for storing data are also shown. The mobile terminal may further include a transmission device 106 for communication functions and an input / output device 108. Those skilled in the art will understand that... Figure 1 The structure shown is for illustrative purposes only and does not limit the structure of the mobile terminal described above. For example, the mobile terminal may also include components that are more... Figure 1 The more or fewer components shown, or having the same Figure 1 The different configurations shown.

[0036] The memory 104 can be used to store computer programs, such as application software programs and modules, like the computer program corresponding to the defrosting control method of the air conditioner in this embodiment of the invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, thereby implementing the above-described method. The memory 104 may include high-speed random access memory and non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory remotely located relative to the processor 102, and these remote memories can be connected to the mobile terminal via a network. Examples of the aforementioned networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof. The transmission device 106 is used to receive or send data via a network. Specific examples of the aforementioned networks may include wireless networks provided by the mobile terminal's communication provider. In one example, the transmission device 106 includes a network interface controller (NIC), which can be connected to other network devices via a base station to communicate with the Internet. In one example, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0037] According to an embodiment of the present invention, a method embodiment of a defrosting control method for an air conditioner is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0038] Figure 2 This is a flowchart of a defrosting control method for an air conditioner according to an embodiment of the present invention, such as... Figure 2 As shown, the defrosting control method of this air conditioner includes the following steps:

[0039] Step S202: When it is determined that the air conditioner is operating in heating mode, the outdoor coil temperature of the outdoor heat exchanger of the air conditioner is obtained.

[0040] In this embodiment, when the air conditioner receives a start command and operates in heating mode in response to the start command, the outdoor coil temperature of the outdoor heat exchanger of the air conditioner is obtained to determine whether the air conditioner meets the conditions for entering defrost mode.

[0041] Furthermore, in this embodiment of the invention, there are multiple ways to determine whether an air conditioner meets the conditions for entering the defrosting stage, and no specific limitation is made here. For example, the cumulative running time of the air conditioner can also be counted, and when the cumulative running time of the air conditioner reaches a certain duration, it can also be determined that the air conditioner meets the conditions for entering the defrosting stage.

[0042] It should be noted that the air conditioner in this embodiment of the invention mainly consists of a heat exchanger, a fan system, and a main control board, while the outdoor unit mainly consists of a compressor, a heat exchanger, a throttling system, a fan system, and a four-way valve. This air conditioner can be a heat pump air conditioner.

[0043] Step S204: When it is determined that the outdoor coil temperature is lower than the outdoor coil temperature threshold, the indoor fan and air guide plate of the air conditioner are both turned off to store the heat generated before the air conditioner enters the defrosting stage.

[0044] In this embodiment, when it is determined that the outdoor coil temperature of the air conditioner is lower than the outdoor coil temperature threshold, the indoor fan and air guide plate of the air conditioner can be controlled to be turned off to form a cavity to store the heat generated before the air conditioner enters the defrosting stage, so as to provide heat for the air conditioner during the defrosting period.

[0045] Step S206: After determining that the indoor fan and air guide plate have been closed for a predetermined period of time, control the air conditioner to enter the defrosting stage.

[0046] In this embodiment, when the air conditioner detects that the system heating operation meets the conditions for entering the defrosting stage, the indoor fan and the air guide vane are closed before the compressor stops for time t1. The heat output from the indoor side during time t1 is stored in the cavity of the indoor fan. After time t1, that is, after determining that the indoor fan and the air guide vane have been closed for a predetermined time, it can be determined that the heat generated before the defrosting stage of the air conditioner has been stored in the cavity formed by the closure of the indoor fan and the air guide vane. At this time, it can be determined that the air conditioner has entered the defrosting stage.

[0047] Step S208: After determining that the air conditioner has entered the defrosting stage, the indoor ambient temperature of the room where the air conditioner is located and the indoor coil temperature of the outdoor heat exchanger of the air conditioner are obtained according to the first predetermined cycle.

[0048] After determining that the air conditioner has entered the defrosting stage, the indoor ambient temperature of the room where the air conditioner is located, the indoor ambient temperature of the room where the air conditioner is located, and the indoor coil temperature of the outdoor heat exchanger of the air conditioner can be obtained according to the first predetermined cycle to determine the next action that the air conditioner needs to perform.

[0049] Step S210: When the temperature difference between the indoor ambient temperature and the indoor coil temperature is determined to be greater than the predetermined temperature, the indoor fan is controlled to stop running.

[0050] As described above, in this embodiment of the invention, when the air conditioner is determined to be operating in heating mode, the outdoor coil temperature of the outdoor heat exchanger is obtained; when the outdoor coil temperature is determined to be lower than the outdoor coil temperature threshold, the indoor fan and air guide plate of the air conditioner are controlled to be turned off to store the heat generated before the air conditioner enters the defrosting stage; after the indoor fan and air guide plate are determined to be turned off for a predetermined period of time, the air conditioner is controlled to enter the defrosting stage; after the air conditioner enters the defrosting stage, the indoor ambient temperature of the room where the air conditioner is located and the indoor coil temperature of the outdoor heat exchanger are obtained according to a first predetermined cycle; when the temperature difference between the indoor ambient temperature and the indoor coil temperature is determined to be greater than a predetermined temperature, the indoor fan is controlled to stop running. This achieves the goal of controlling the indoor fan and air guide plate of the air conditioner to be turned off for a period of time before the air conditioner enters the defrosting stage to store the heat generated by the air conditioner entering the defrosting stage, so as to provide heat during the defrosting period and reduce the impact on the defrosting efficiency of the outdoor heat exchanger, thereby achieving the technical effect of improving the defrosting speed of the air conditioner.

[0051] Therefore, the technical solution provided by the above embodiments of the present invention solves the technical problem in the related art that the indoor heat exchanger of an air conditioner is prone to excessively low temperature and frost formation during defrosting mode under heating conditions, which affects the defrosting efficiency of the outdoor heat exchanger, thereby reducing the heat release efficiency of the outdoor heat exchanger and slowing down the defrosting speed.

[0052] According to the above embodiments of the present invention, obtaining the outdoor coil temperature of the outdoor heat exchanger of an air conditioner may include: triggering a temperature acquisition device to collect the temperatures of multiple outdoor coils of the outdoor heat exchanger according to a second predetermined cycle within a predetermined time period; and obtaining the multiple outdoor coil temperatures collected by the temperature acquisition device.

[0053] In this embodiment, a temperature acquisition device (e.g., a temperature sensor) can be triggered over a period of time to acquire the temperatures of multiple outdoor coils of the outdoor heat exchanger according to a predetermined cycle, so as to obtain multiple outdoor coil temperatures.

[0054] For example, the temperature sensor is controlled to collect the outdoor coil temperature of the outdoor heat exchanger of the air conditioner every 5 seconds for 10 minutes to obtain multiple outdoor coil temperatures.

[0055] In the above embodiments of the present invention, when it is determined that the outdoor coil temperature is lower than the outdoor coil temperature threshold, the indoor fan and air guide of the air conditioner are both turned off, including: comparing multiple outdoor coil temperatures with the outdoor coil temperature threshold to obtain comparison results; when the comparison results indicate that at least one outdoor coil temperature is lower than the outdoor coil temperature threshold, the indoor fan and air guide of the air conditioner are both turned off.

[0056] In this embodiment, multiple outdoor coil temperatures can be compared with outdoor coil temperature thresholds to obtain comparison results. When the comparison results indicate that at least one outdoor coil temperature is lower than the outdoor coil temperature threshold, the indoor fan and air guide of the air conditioner are controlled to be turned off to store the heat generated before the air conditioner enters the defrosting stage, so as to provide heat for the air conditioner during the defrosting period.

[0057] According to the above embodiments of the present invention, the defrosting control method of the air conditioner further includes: acquiring the outdoor ambient temperature of the air conditioner; and adjusting the outdoor coil temperature threshold according to the outdoor ambient temperature.

[0058] In this embodiment, the outdoor ambient temperature of the air conditioner can be obtained, and the outdoor coil temperature threshold can be adjusted according to the outdoor ambient temperature, so as to determine more accurately whether the air conditioner meets the conditions for entering defrost, making the control of the air conditioner more accurate.

[0059] For example, different outdoor coil temperature thresholds can be assigned to relatively warm and relatively cold outdoor temperatures, thus taking weather factors into account when determining whether an air conditioner meets the conditions for entering defrost mode, making the judgment more accurate.

[0060] According to the above embodiments of the present invention, controlling the air conditioner to enter the defrosting stage includes: controlling the air conditioner's compressor to stop running; and controlling the air conditioner's four-way valve to switch directions.

[0061] In this embodiment, when the air conditioner enters the defrosting stage, the air conditioner compressor will stop, and at the same time, the four-way valve of the air conditioner will switch to the defrosting and cooling operation.

[0062] According to the above embodiments of the present invention, the defrosting control method of the air conditioner may further include: after determining that the air conditioner has entered the defrosting stage, controlling the current speed of the indoor fan of the air conditioner to decrease to a predetermined speed, and simultaneously controlling the indoor fan to switch from forward operation to reverse operation, so that the air outlet of the indoor fan is converted into the air inlet, and the air inlet of the indoor fan is converted into the air outlet.

[0063] In this embodiment, once the air conditioner enters the defrosting stage, the compressor stops, the four-way valve reverses, and the air conditioner switches from defrosting to cooling operation. During defrosting, the refrigerant on the indoor side changes from releasing heat to absorbing heat. At this time, the indoor main control board issues a command for the indoor fan to reverse and run at a low speed. The indoor fan receives the command and runs at a low speed r. At this time, the air outlet becomes the air inlet, and the air inlet becomes the air outlet. The indoor fan forces the heat stored in the fan cavity and the heat from the indoor air to exchange with the refrigerant on the indoor side. The refrigerant after heat exchange enters the outdoor side, and the heat carried away is used for defrosting the outdoor heat exchanger.

[0064] According to the above embodiments of the present invention, the defrosting control method of the air conditioner may further include: when it is determined that the temperature difference between the indoor ambient temperature and the indoor coil temperature is not greater than a predetermined temperature, continuing to control the indoor fan to run in reverse at the adjusted current speed.

[0065] In this embodiment, throughout the defrosting process, the indoor main control board continuously monitors the indoor ambient temperature T1 and the indoor heat exchanger temperature T2, and calculates the difference ΔT between the ambient temperature and the heat exchanger temperature. When ΔT is detected to be less than temperature T3 (i.e., the predetermined temperature), the indoor fan continues to run; when ΔT is detected to be greater than temperature T3, the indoor fan stops running. Because the indoor side operates in cooling mode during defrosting, to avoid a rapid drop in indoor ambient temperature during defrosting that could lead to poor comfort, the indoor fan stops operating when ΔT is detected to be greater than temperature T3. This control method can improve the defrosting speed on the outdoor side and also ensures indoor comfort to a certain extent during defrosting, thus improving overall heating comfort and heating performance.

[0066] Figure 3 This is a flowchart of an optional defrosting control method for an air conditioner according to an embodiment of the present invention, such as... Figure 3As shown, when the air conditioner is in heating mode, the main control board detects whether the air conditioner meets the conditions for entering defrost mode. The indoor unit's main control board then issues corresponding commands based on the feedback information. If the air conditioner determines that the defrost conditions are met, the indoor fan and air guide vane are closed for the time t1 before defrosting begins; otherwise, the air conditioner continues to operate in heating mode. Then, the air conditioner enters the defrost stage. The indoor fan reverses direction and runs at a low speed r. At this time, the air outlet becomes the air inlet, and the air inlet becomes the air outlet. The indoor fan forces heat exchange between the stored heat in the fan cavity and the heat from the indoor air and the refrigerant on the indoor side. The refrigerant after heat exchange enters the outdoor side, and the heat it carries away is used for defrosting the outdoor heat exchanger. The air on the indoor side, after heat exchange, is blown towards the wall through the air intake grille, avoiding the phenomenon of cold air blowing in during defrosting when the fan is running. Throughout the defrosting process, the main control board monitors the real-time indoor ambient temperature T1 and the indoor heat exchanger temperature T2, and calculates the temperature difference ΔT. When ΔT is detected to be less than temperature T3, the indoor fan continues to run; when ΔT is detected to be greater than temperature T3, the indoor fan stops running. Because the indoor side operates in cooling mode during defrosting, to avoid a rapid drop in indoor ambient temperature leading to poor comfort, the indoor fan stops operating when ΔT is detected to be greater than temperature T3. This control method improves the defrosting speed on the outdoor side and also ensures indoor comfort to a certain extent during defrosting, thus improving overall heating comfort and heating performance.

[0067] In the above embodiment, before the air conditioner enters defrost t1, the indoor fan and air guide plate are turned off, and the heat before entering defrost t1 is stored in the fan cavity. After the air conditioner enters defrost, the air conditioner switches to cooling operation, and the refrigerant on the indoor side is in a state of absorbing heat. At this time, the indoor fan is controlled to reverse at a low speed, and the heat-exchanged air is blown out from the back of the air conditioner and blown towards the wall. The refrigerant absorbs the heat stored in the fan cavity and the heat in the indoor air and carries it to the outdoor heat exchanger for defrosting. This defrosting control method of heat pump air conditioner greatly shortens the defrosting time of the air conditioner and improves the comfort of the room air conditioner.

[0068] Due to the control method of this invention, with an internal temperature of 7℃ and an external temperature of 2℃ / 84% and a wall temperature of 10±0.5℃, the defrosting time of the air conditioner is shortened by 1 minute, the indoor temperature decreases by 1℃ during defrosting, and the time required to recover to the pre-defrosting indoor temperature is shortened by 3 minutes; with an internal temperature of 0℃ and an external temperature of -5℃ / 84%, the defrosting time is shortened by 1.5 minutes, the indoor temperature decreases by 1.5℃ during defrosting, and the time required to recover to the pre-defrosting indoor temperature is shortened by 2 minutes; Table 1 shows the correspondence between test conditions, change points, temperature drop during defrosting, defrosting time, time required to recover to the pre-defrosting indoor temperature, and defrosting thermal comfort experience.

[0069] Table 1

[0070]

[0071] As can be seen from the above, the technical solution provided by the embodiments of the present invention increases the temperature of the refrigerant by controlling the indoor fan during defrosting, so as to defrost the outdoor heat exchanger more quickly; at the same time, by controlling the air guide plate of the air conditioner before defrosting, heat is stored in the fan cavity to provide heat during defrosting; the defrosting time of the outdoor heat exchanger of the air conditioner is shortened, and the comfort of the air conditioner in heating operation is improved; the problem of ice formation caused by the indoor heat exchanger being too cold during defrosting is solved.

[0072] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0073] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0074] According to embodiments of the present invention, a defrosting control device for an air conditioner for implementing the above-described defrosting control method for an air conditioner is also provided. Figure 4 This is a schematic diagram of a defrosting control device for an air conditioner according to an embodiment of the present invention, as shown below. Figure 4 As shown, the device includes: a first acquisition unit 41, a first control unit 43, a second control unit 45, a second acquisition unit 47, and a third control unit 49. The defrosting control device of this air conditioner will be described below.

[0075] The first acquisition unit 41 is used to acquire the outdoor coil temperature of the outdoor heat exchanger of the air conditioner when it is determined that the air conditioner is operating in heating mode.

[0076] The first control unit 43 is used to control the indoor fan and air guide vane of the air conditioner to be turned off when the outdoor coil temperature is determined to be lower than the outdoor coil temperature threshold, so as to store the heat generated before the air conditioner enters the defrosting stage.

[0077] The second control unit 45 is used to control the air conditioner to enter the defrosting stage after determining that the indoor fan and the air guide plate have been closed for a predetermined period of time.

[0078] The second acquisition unit 47 is used to acquire the indoor ambient temperature of the room where the air conditioner is located and the indoor coil temperature of the outdoor heat exchanger of the air conditioner according to a first predetermined cycle after determining that the air conditioner has entered the defrosting stage.

[0079] The third control unit 49 is used to control the indoor fan to stop operating when the temperature difference between the indoor ambient temperature and the indoor coil temperature is greater than a predetermined temperature.

[0080] It should be noted that the first acquisition unit 41, the first control unit 43, the second control unit 45, the second acquisition unit 47 and the third control unit 49 mentioned above correspond to steps S202 to S210 in the above embodiments. The three modules and the corresponding steps implement the same instances and application scenarios, but are not limited to the content disclosed in the above embodiments.

[0081] As can be seen from the above, in the solution described in the above embodiments of the present invention, the first acquisition unit can acquire the outdoor coil temperature of the outdoor heat exchanger of the air conditioner when it is determined that the air conditioner is operating in heating mode; then, the first control unit can control the indoor fan and air guide plate of the air conditioner to be turned off when it is determined that the outdoor coil temperature is lower than the outdoor coil temperature threshold, so as to store the heat generated before the air conditioner enters the defrosting stage; then, the second control unit can control the air conditioner to enter the defrosting stage after it is determined that the indoor fan and air guide plate have been turned off for a predetermined time; and then the second acquisition unit can determine the defrosting stage after it is determined that the air conditioner has entered the defrosting stage. After the initial stage, the indoor ambient temperature of the room where the air conditioner is located and the indoor coil temperature of the outdoor heat exchanger of the air conditioner are obtained according to the first predetermined cycle. When the temperature difference between the indoor ambient temperature and the indoor coil temperature is determined to be greater than the predetermined temperature by the third control unit, the indoor fan is controlled to stop running. This achieves the goal of controlling the indoor fan and air guide plate of the air conditioner to be turned off for a period of time before the air conditioner enters the defrosting stage, so as to store the heat generated by the air conditioner entering the defrosting stage, provide heat during the defrosting period, reduce the impact on the defrosting efficiency of the outdoor heat exchanger, and achieve the technical effect of improving the defrosting speed of the air conditioner.

[0082] Therefore, the technical solution provided by the above embodiments of the present invention solves the technical problem in the related art that the indoor heat exchanger of an air conditioner is prone to excessively low temperature and frost formation during defrosting mode under heating conditions, which affects the defrosting efficiency of the outdoor heat exchanger, thereby reducing the heat release efficiency of the outdoor heat exchanger and slowing down the defrosting speed.

[0083] Optionally, the first acquisition unit includes: an acquisition module, configured to trigger a temperature acquisition device to acquire the temperatures of multiple outdoor coils of the outdoor heat exchanger according to a second predetermined cycle within a predetermined time period; and a first acquisition module, configured to acquire the temperatures of the multiple outdoor coils acquired by the temperature acquisition device.

[0084] Optionally, the first control unit includes: a comparison module for comparing multiple outdoor coil temperatures with an outdoor coil temperature threshold to obtain a comparison result; and a first control module for controlling the indoor fan and air guide vane of the air conditioner to shut down when the comparison result indicates that at least one outdoor coil temperature is lower than the outdoor coil temperature threshold.

[0085] Optionally, the defrosting control device of the air conditioner further includes: a third acquisition unit for acquiring the outdoor ambient temperature of the air conditioner; and an adjustment unit for adjusting the outdoor coil temperature threshold according to the outdoor ambient temperature.

[0086] Optionally, the second control unit includes: a second control module for controlling the compressor of the air conditioner to stop running; and a third control module for controlling the reversing of the four-way valve of the air conditioner.

[0087] Optionally, the defrosting control device of the air conditioner further includes: a fourth control unit, which, after determining that the air conditioner has entered the defrosting stage, controls the current speed of the indoor fan of the air conditioner to decrease to a predetermined speed, and simultaneously controls the indoor fan to switch from forward operation to reverse operation, so that the air outlet of the indoor fan is converted into the air inlet, and the air inlet of the indoor fan is converted into the air outlet.

[0088] Optionally, the defrosting control device of the air conditioner further includes: a fifth control unit, used to continue controlling the indoor fan to run in reverse at the adjusted current speed when the temperature difference between the indoor ambient temperature and the indoor coil temperature is determined to be no greater than the predetermined temperature.

[0089] According to another aspect of the present invention, an air conditioner is also provided, which uses the defrosting control method of any of the above-described air conditioners.

[0090] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored program, wherein the program executes the defrosting control method of an air conditioner according to any one of the above embodiments.

[0091] Optionally, in this embodiment, the computer-readable storage medium may be located in any computer terminal in a group of computer terminals in a computer network, or in any communication device in a group of communication devices.

[0092] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: when it is determined that the air conditioner is operating in heating mode, acquiring the outdoor coil temperature of the outdoor heat exchanger of the air conditioner; when it is determined that the outdoor coil temperature is lower than the outdoor coil temperature threshold, controlling both the indoor fan and the air guide plate of the air conditioner to shut down to store the heat generated before the air conditioner enters the defrosting stage; after determining that the duration for which both the indoor fan and the air guide plate are shut down has reached a predetermined duration, controlling the air conditioner to enter the defrosting stage; after determining that the air conditioner has entered the defrosting stage, acquiring the indoor ambient temperature of the room where the air conditioner is located and the indoor coil temperature of the outdoor heat exchanger of the air conditioner according to a first predetermined cycle; when it is determined that the temperature difference between the indoor ambient temperature and the indoor coil temperature is greater than a predetermined temperature, controlling the indoor fan to stop operating.

[0093] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: triggering a temperature acquisition device to acquire the temperatures of multiple outdoor coils of the outdoor heat exchanger according to a second predetermined cycle within a predetermined time period; and acquiring the temperatures of the multiple outdoor coils acquired by the temperature acquisition device.

[0094] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: comparing multiple outdoor coil temperatures with outdoor coil temperature thresholds respectively to obtain comparison results; when the comparison results indicate that at least one outdoor coil temperature is lower than the outdoor coil temperature threshold, controlling both the indoor fan and the air guide plate of the air conditioner to shut down.

[0095] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: obtaining the outdoor ambient temperature of the air conditioner; adjusting the outdoor coil temperature threshold according to the outdoor ambient temperature.

[0096] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: controlling the compressor of the air conditioner to stop running; controlling the four-way valve of the air conditioner to switch.

[0097] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: after determining that the air conditioner has entered the defrosting stage, controlling the current speed of the indoor fan of the air conditioner to decrease to a predetermined speed, and simultaneously controlling the indoor fan to switch from forward operation to reverse operation, so that the air outlet of the indoor fan is converted into the air inlet, and the air inlet of the indoor fan is converted into the air outlet.

[0098] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: when it is determined that the temperature difference between the indoor ambient temperature and the indoor coil temperature is not greater than a predetermined temperature, the indoor fan continues to be controlled to run in reverse at the adjusted current speed.

[0099] According to another aspect of the present invention, a processor is also provided, which is used to run a program, wherein the program executes the defrosting control method of an air conditioner described above.

[0100] Optionally, in this embodiment, the program code executing the following steps during the above program execution is as follows: when it is determined that the air conditioner is operating in heating mode, the outdoor coil temperature of the outdoor heat exchanger of the air conditioner is obtained; when it is determined that the outdoor coil temperature is lower than the outdoor coil temperature threshold, the indoor fan and air guide of the air conditioner are controlled to be turned off to store the heat generated before the air conditioner enters the defrosting stage; after it is determined that the indoor fan and air guide have been turned off for a predetermined period of time, the air conditioner is controlled to enter the defrosting stage; after it is determined that the air conditioner has entered the defrosting stage, the indoor ambient temperature of the room where the air conditioner is located and the indoor coil temperature of the outdoor heat exchanger of the air conditioner are obtained according to a first predetermined cycle; when it is determined that the temperature difference between the indoor ambient temperature and the indoor coil temperature is greater than a predetermined temperature, the indoor fan is controlled to stop running.

[0101] Optionally, in this embodiment, the program code that executes the following steps when the above program runs is: triggering the temperature acquisition device to acquire the temperature of multiple outdoor coils of the outdoor heat exchanger according to a second predetermined cycle within a predetermined time period; and acquiring the multiple outdoor coil temperatures acquired by the temperature acquisition device.

[0102] Optionally, in this embodiment, the program code that executes the following steps when the above program runs is: comparing the temperatures of multiple outdoor coils with the outdoor coil temperature threshold to obtain a comparison result; when the comparison result indicates that at least one outdoor coil temperature is lower than the outdoor coil temperature threshold, controlling the indoor fan and air guide plate of the air conditioner to be turned off.

[0103] Optionally, in this embodiment, the program code that executes the following steps when the above program runs is: obtaining the outdoor ambient temperature of the air conditioner; adjusting the outdoor coil temperature threshold according to the outdoor ambient temperature.

[0104] Optionally, in this embodiment, the program code that executes the following steps when the above program runs is: controlling the air conditioner's compressor to stop running; controlling the air conditioner's four-way valve to switch directions.

[0105] Optionally, in this embodiment, the program code that executes the following steps when the above program runs is: after determining that the air conditioner has entered the defrosting stage, the current speed of the indoor fan of the air conditioner is reduced to a predetermined speed, and at the same time the indoor fan is switched from forward operation to reverse operation, so that the air outlet of the indoor fan is converted into the air inlet, and the air inlet of the indoor fan is converted into the air outlet.

[0106] Optionally, in this embodiment, the program code that executes the following steps when the above program runs: when it is determined that the temperature difference between the indoor ambient temperature and the indoor coil temperature is not greater than the predetermined temperature, the indoor fan continues to be controlled to run in reverse at the adjusted current speed.

[0107] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0108] It will be apparent to those skilled in the art that the modules or steps of the present invention can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. They can be implemented using device-executable program code, and thus can be stored in a storage device for execution by a computing device. In some cases, the steps shown or described can be performed in a different order than those presented herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular hardware and software combination.

[0109] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0110] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1A device that provides the functions specified in one or more boxes.

[0111] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0112] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0113] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0114] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0115] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0116] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0117] Furthermore, in the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0118] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0119] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0120] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0121] If the integrated unit is implemented as 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. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0122] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A defrosting control method for an air conditioner, characterized in that, include: When the air conditioner is determined to be operating in heating mode, the outdoor coil temperature of the outdoor heat exchanger of the air conditioner is obtained. When the outdoor coil temperature is determined to be lower than the outdoor coil temperature threshold, the indoor fan and air guide plate of the air conditioner are both turned off to store the heat generated before the air conditioner enters the defrosting stage. After determining that the indoor fan and the air guide plate have been closed for a predetermined period of time, the air conditioner is controlled to enter the defrosting stage. After determining that the air conditioner has entered the defrosting stage, the indoor ambient temperature of the room where the air conditioner is located and the indoor coil temperature of the indoor heat exchanger of the air conditioner are obtained according to the first predetermined cycle. When the temperature difference between the indoor ambient temperature and the indoor coil temperature is determined to be greater than a predetermined temperature, the indoor fan is controlled to stop operating; The defrosting control method further includes: acquiring the outdoor ambient temperature of the air conditioner; adjusting the outdoor coil temperature threshold according to the outdoor ambient temperature; wherein controlling the air conditioner to enter the defrosting stage includes: controlling the compressor of the air conditioner to stop running; controlling the four-way valve of the air conditioner to switch directions; The defrosting control method further includes: after determining that the air conditioner has entered the defrosting stage, controlling the current speed of the indoor fan of the air conditioner to decrease to a predetermined speed, and simultaneously controlling the indoor fan to switch from forward operation to reverse operation, so that the air outlet of the indoor fan is converted into the air inlet, and the air inlet of the indoor fan is converted into the air outlet.

2. The defrosting control method for an air conditioner according to claim 1, characterized in that, Obtain the outdoor coil temperature of the outdoor heat exchanger of the air conditioner, including: Within a predetermined time period, a temperature acquisition device is triggered to collect the temperature of multiple outdoor coils of the outdoor heat exchanger according to a second predetermined cycle. The outdoor coil temperatures are acquired by the temperature acquisition device.

3. The defrosting control method for an air conditioner according to claim 1, characterized in that, When the outdoor coil temperature is determined to be lower than the outdoor coil temperature threshold, the indoor fan and air deflector of the air conditioner are both shut off, including: The temperatures of multiple outdoor coils are compared with the outdoor coil temperature thresholds to obtain comparison results. When the comparison result indicates that at least one of the outdoor coil temperatures is lower than the outdoor coil temperature threshold, the indoor fan and the air guide plate of the air conditioner are both turned off.

4. The defrosting control method for an air conditioner according to claim 1, characterized in that, Also includes: When the temperature difference between the indoor ambient temperature and the indoor coil temperature is determined to be no greater than the predetermined temperature, the indoor fan continues to be controlled to run in reverse at the adjusted current speed.

5. A defrosting control device for an air conditioner, characterized in that, include: The first acquisition unit is used to acquire the outdoor coil temperature of the outdoor heat exchanger of the air conditioner when it is determined that the air conditioner is operating in heating mode. The first control unit is used to control the indoor fan and air guide plate of the air conditioner to be turned off when the outdoor coil temperature is determined to be lower than the outdoor coil temperature threshold, so as to store the heat generated by the air conditioner before entering the defrosting stage. The second control unit is used to control the air conditioner to enter the defrosting stage after determining that the indoor fan and the air guide plate have been closed for a predetermined period of time. The second acquisition unit is used to acquire the indoor ambient temperature of the room where the air conditioner is located and the indoor coil temperature of the indoor heat exchanger of the air conditioner according to a first predetermined cycle after determining that the air conditioner has entered the defrosting stage. The third control unit is used to control the indoor fan to stop operating when it is determined that the temperature difference between the indoor ambient temperature and the indoor coil temperature is greater than a predetermined temperature; The defrosting control device of the air conditioner further includes: a third acquisition unit for acquiring the outdoor ambient temperature of the air conditioner; and an adjustment unit for adjusting the outdoor coil temperature threshold according to the outdoor ambient temperature. The process of controlling the air conditioner to enter the defrosting stage includes: controlling the air conditioner's compressor to stop running; and controlling the air conditioner's four-way valve to switch directions. The defrosting control method of the air conditioner further includes: after determining that the air conditioner has entered the defrosting stage, controlling the current speed of the indoor fan of the air conditioner to decrease to a predetermined speed, and simultaneously controlling the indoor fan to switch from forward operation to reverse operation, so that the air outlet of the indoor fan is converted into the air inlet, and the air inlet of the indoor fan is converted into the air outlet.

6. An air conditioner, characterized in that, The air conditioner uses the defrosting control method of any one of claims 1 to 4.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein the program executes the defrosting control method for an air conditioner according to any one of claims 1 to 4.

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